| // SPDX-License-Identifier: GPL-2.0+ |
| // |
| // extcon-max77843.c - Maxim MAX77843 extcon driver to support |
| // MUIC(Micro USB Interface Controller) |
| // |
| // Copyright (C) 2015 Samsung Electronics |
| // Author: Jaewon Kim <jaewon02.kim@samsung.com> |
| |
| #include <linux/extcon-provider.h> |
| #include <linux/i2c.h> |
| #include <linux/interrupt.h> |
| #include <linux/kernel.h> |
| #include <linux/mfd/max77693-common.h> |
| #include <linux/mfd/max77843-private.h> |
| #include <linux/module.h> |
| #include <linux/platform_device.h> |
| #include <linux/workqueue.h> |
| |
| #define DELAY_MS_DEFAULT 15000 /* unit: millisecond */ |
| |
| enum max77843_muic_status { |
| MAX77843_MUIC_STATUS1 = 0, |
| MAX77843_MUIC_STATUS2, |
| MAX77843_MUIC_STATUS3, |
| |
| MAX77843_MUIC_STATUS_NUM, |
| }; |
| |
| struct max77843_muic_info { |
| struct device *dev; |
| struct max77693_dev *max77843; |
| struct extcon_dev *edev; |
| |
| struct mutex mutex; |
| struct work_struct irq_work; |
| struct delayed_work wq_detcable; |
| |
| u8 status[MAX77843_MUIC_STATUS_NUM]; |
| int prev_cable_type; |
| int prev_chg_type; |
| int prev_gnd_type; |
| |
| bool irq_adc; |
| bool irq_chg; |
| }; |
| |
| enum max77843_muic_cable_group { |
| MAX77843_CABLE_GROUP_ADC = 0, |
| MAX77843_CABLE_GROUP_ADC_GND, |
| MAX77843_CABLE_GROUP_CHG, |
| }; |
| |
| enum max77843_muic_adc_debounce_time { |
| MAX77843_DEBOUNCE_TIME_5MS = 0, |
| MAX77843_DEBOUNCE_TIME_10MS, |
| MAX77843_DEBOUNCE_TIME_25MS, |
| MAX77843_DEBOUNCE_TIME_38_62MS, |
| }; |
| |
| /* Define accessory cable type */ |
| enum max77843_muic_accessory_type { |
| MAX77843_MUIC_ADC_GROUND = 0, |
| MAX77843_MUIC_ADC_SEND_END_BUTTON, |
| MAX77843_MUIC_ADC_REMOTE_S1_BUTTON, |
| MAX77843_MUIC_ADC_REMOTE_S2_BUTTON, |
| MAX77843_MUIC_ADC_REMOTE_S3_BUTTON, |
| MAX77843_MUIC_ADC_REMOTE_S4_BUTTON, |
| MAX77843_MUIC_ADC_REMOTE_S5_BUTTON, |
| MAX77843_MUIC_ADC_REMOTE_S6_BUTTON, |
| MAX77843_MUIC_ADC_REMOTE_S7_BUTTON, |
| MAX77843_MUIC_ADC_REMOTE_S8_BUTTON, |
| MAX77843_MUIC_ADC_REMOTE_S9_BUTTON, |
| MAX77843_MUIC_ADC_REMOTE_S10_BUTTON, |
| MAX77843_MUIC_ADC_REMOTE_S11_BUTTON, |
| MAX77843_MUIC_ADC_REMOTE_S12_BUTTON, |
| MAX77843_MUIC_ADC_RESERVED_ACC_1, |
| MAX77843_MUIC_ADC_RESERVED_ACC_2, |
| MAX77843_MUIC_ADC_RESERVED_ACC_3, /* SmartDock */ |
| MAX77843_MUIC_ADC_RESERVED_ACC_4, |
| MAX77843_MUIC_ADC_RESERVED_ACC_5, |
| MAX77843_MUIC_ADC_AUDIO_DEVICE_TYPE2, |
| MAX77843_MUIC_ADC_PHONE_POWERED_DEV, |
| MAX77843_MUIC_ADC_TTY_CONVERTER, |
| MAX77843_MUIC_ADC_UART_CABLE, |
| MAX77843_MUIC_ADC_CEA936A_TYPE1_CHG, |
| MAX77843_MUIC_ADC_FACTORY_MODE_USB_OFF, |
| MAX77843_MUIC_ADC_FACTORY_MODE_USB_ON, |
| MAX77843_MUIC_ADC_AV_CABLE_NOLOAD, |
| MAX77843_MUIC_ADC_CEA936A_TYPE2_CHG, |
| MAX77843_MUIC_ADC_FACTORY_MODE_UART_OFF, |
| MAX77843_MUIC_ADC_FACTORY_MODE_UART_ON, |
| MAX77843_MUIC_ADC_AUDIO_DEVICE_TYPE1, |
| MAX77843_MUIC_ADC_OPEN, |
| |
| /* |
| * The below accessories should check |
| * not only ADC value but also ADC1K and VBVolt value. |
| */ |
| /* Offset|ADC1K|VBVolt| */ |
| MAX77843_MUIC_GND_USB_HOST = 0x100, /* 0x1| 0| 0| */ |
| MAX77843_MUIC_GND_USB_HOST_VB = 0x101, /* 0x1| 0| 1| */ |
| MAX77843_MUIC_GND_MHL = 0x102, /* 0x1| 1| 0| */ |
| MAX77843_MUIC_GND_MHL_VB = 0x103, /* 0x1| 1| 1| */ |
| }; |
| |
| /* Define charger cable type */ |
| enum max77843_muic_charger_type { |
| MAX77843_MUIC_CHG_NONE = 0, |
| MAX77843_MUIC_CHG_USB, |
| MAX77843_MUIC_CHG_DOWNSTREAM, |
| MAX77843_MUIC_CHG_DEDICATED, |
| MAX77843_MUIC_CHG_SPECIAL_500MA, |
| MAX77843_MUIC_CHG_SPECIAL_1A, |
| MAX77843_MUIC_CHG_SPECIAL_BIAS, |
| MAX77843_MUIC_CHG_RESERVED, |
| MAX77843_MUIC_CHG_GND, |
| MAX77843_MUIC_CHG_DOCK, |
| }; |
| |
| static const unsigned int max77843_extcon_cable[] = { |
| EXTCON_USB, |
| EXTCON_USB_HOST, |
| EXTCON_CHG_USB_SDP, |
| EXTCON_CHG_USB_DCP, |
| EXTCON_CHG_USB_CDP, |
| EXTCON_CHG_USB_FAST, |
| EXTCON_CHG_USB_SLOW, |
| EXTCON_DISP_MHL, |
| EXTCON_DOCK, |
| EXTCON_JIG, |
| EXTCON_NONE, |
| }; |
| |
| struct max77843_muic_irq { |
| unsigned int irq; |
| const char *name; |
| unsigned int virq; |
| }; |
| |
| static struct max77843_muic_irq max77843_muic_irqs[] = { |
| { MAX77843_MUIC_IRQ_INT1_ADC, "MUIC-ADC" }, |
| { MAX77843_MUIC_IRQ_INT1_ADCERROR, "MUIC-ADC_ERROR" }, |
| { MAX77843_MUIC_IRQ_INT1_ADC1K, "MUIC-ADC1K" }, |
| { MAX77843_MUIC_IRQ_INT2_CHGTYP, "MUIC-CHGTYP" }, |
| { MAX77843_MUIC_IRQ_INT2_CHGDETRUN, "MUIC-CHGDETRUN" }, |
| { MAX77843_MUIC_IRQ_INT2_DCDTMR, "MUIC-DCDTMR" }, |
| { MAX77843_MUIC_IRQ_INT2_DXOVP, "MUIC-DXOVP" }, |
| { MAX77843_MUIC_IRQ_INT2_VBVOLT, "MUIC-VBVOLT" }, |
| { MAX77843_MUIC_IRQ_INT3_VBADC, "MUIC-VBADC" }, |
| { MAX77843_MUIC_IRQ_INT3_VDNMON, "MUIC-VDNMON" }, |
| { MAX77843_MUIC_IRQ_INT3_DNRES, "MUIC-DNRES" }, |
| { MAX77843_MUIC_IRQ_INT3_MPNACK, "MUIC-MPNACK"}, |
| { MAX77843_MUIC_IRQ_INT3_MRXBUFOW, "MUIC-MRXBUFOW"}, |
| { MAX77843_MUIC_IRQ_INT3_MRXTRF, "MUIC-MRXTRF"}, |
| { MAX77843_MUIC_IRQ_INT3_MRXPERR, "MUIC-MRXPERR"}, |
| { MAX77843_MUIC_IRQ_INT3_MRXRDY, "MUIC-MRXRDY"}, |
| }; |
| |
| static const struct regmap_config max77843_muic_regmap_config = { |
| .reg_bits = 8, |
| .val_bits = 8, |
| .max_register = MAX77843_MUIC_REG_END, |
| }; |
| |
| static const struct regmap_irq max77843_muic_irq[] = { |
| /* INT1 interrupt */ |
| { .reg_offset = 0, .mask = MAX77843_MUIC_ADC, }, |
| { .reg_offset = 0, .mask = MAX77843_MUIC_ADCERROR, }, |
| { .reg_offset = 0, .mask = MAX77843_MUIC_ADC1K, }, |
| |
| /* INT2 interrupt */ |
| { .reg_offset = 1, .mask = MAX77843_MUIC_CHGTYP, }, |
| { .reg_offset = 1, .mask = MAX77843_MUIC_CHGDETRUN, }, |
| { .reg_offset = 1, .mask = MAX77843_MUIC_DCDTMR, }, |
| { .reg_offset = 1, .mask = MAX77843_MUIC_DXOVP, }, |
| { .reg_offset = 1, .mask = MAX77843_MUIC_VBVOLT, }, |
| |
| /* INT3 interrupt */ |
| { .reg_offset = 2, .mask = MAX77843_MUIC_VBADC, }, |
| { .reg_offset = 2, .mask = MAX77843_MUIC_VDNMON, }, |
| { .reg_offset = 2, .mask = MAX77843_MUIC_DNRES, }, |
| { .reg_offset = 2, .mask = MAX77843_MUIC_MPNACK, }, |
| { .reg_offset = 2, .mask = MAX77843_MUIC_MRXBUFOW, }, |
| { .reg_offset = 2, .mask = MAX77843_MUIC_MRXTRF, }, |
| { .reg_offset = 2, .mask = MAX77843_MUIC_MRXPERR, }, |
| { .reg_offset = 2, .mask = MAX77843_MUIC_MRXRDY, }, |
| }; |
| |
| static const struct regmap_irq_chip max77843_muic_irq_chip = { |
| .name = "max77843-muic", |
| .status_base = MAX77843_MUIC_REG_INT1, |
| .mask_base = MAX77843_MUIC_REG_INTMASK1, |
| .mask_invert = true, |
| .num_regs = 3, |
| .irqs = max77843_muic_irq, |
| .num_irqs = ARRAY_SIZE(max77843_muic_irq), |
| }; |
| |
| static int max77843_muic_set_path(struct max77843_muic_info *info, |
| u8 val, bool attached, bool nobccomp) |
| { |
| struct max77693_dev *max77843 = info->max77843; |
| int ret = 0; |
| unsigned int ctrl1, ctrl2; |
| |
| if (attached) |
| ctrl1 = val; |
| else |
| ctrl1 = MAX77843_MUIC_CONTROL1_SW_OPEN; |
| if (nobccomp) { |
| /* Disable BC1.2 protocol and force manual switch control */ |
| ctrl1 |= MAX77843_MUIC_CONTROL1_NOBCCOMP_MASK; |
| } |
| |
| ret = regmap_update_bits(max77843->regmap_muic, |
| MAX77843_MUIC_REG_CONTROL1, |
| MAX77843_MUIC_CONTROL1_COM_SW | |
| MAX77843_MUIC_CONTROL1_NOBCCOMP_MASK, |
| ctrl1); |
| if (ret < 0) { |
| dev_err(info->dev, "Cannot switch MUIC port\n"); |
| return ret; |
| } |
| |
| if (attached) |
| ctrl2 = MAX77843_MUIC_CONTROL2_CPEN_MASK; |
| else |
| ctrl2 = MAX77843_MUIC_CONTROL2_LOWPWR_MASK; |
| |
| ret = regmap_update_bits(max77843->regmap_muic, |
| MAX77843_MUIC_REG_CONTROL2, |
| MAX77843_MUIC_CONTROL2_LOWPWR_MASK | |
| MAX77843_MUIC_CONTROL2_CPEN_MASK, ctrl2); |
| if (ret < 0) { |
| dev_err(info->dev, "Cannot update lowpower mode\n"); |
| return ret; |
| } |
| |
| dev_dbg(info->dev, |
| "CONTROL1 : 0x%02x, CONTROL2 : 0x%02x, state : %s\n", |
| ctrl1, ctrl2, attached ? "attached" : "detached"); |
| |
| return 0; |
| } |
| |
| static void max77843_charger_set_otg_vbus(struct max77843_muic_info *info, |
| bool on) |
| { |
| struct max77693_dev *max77843 = info->max77843; |
| unsigned int cnfg00; |
| |
| if (on) |
| cnfg00 = MAX77843_CHG_OTG_MASK | MAX77843_CHG_BOOST_MASK; |
| else |
| cnfg00 = MAX77843_CHG_ENABLE | MAX77843_CHG_BUCK_MASK; |
| |
| regmap_update_bits(max77843->regmap_chg, MAX77843_CHG_REG_CHG_CNFG_00, |
| MAX77843_CHG_MODE_MASK, cnfg00); |
| } |
| |
| static int max77843_muic_get_cable_type(struct max77843_muic_info *info, |
| enum max77843_muic_cable_group group, bool *attached) |
| { |
| int adc, chg_type, cable_type, gnd_type; |
| |
| adc = info->status[MAX77843_MUIC_STATUS1] & |
| MAX77843_MUIC_STATUS1_ADC_MASK; |
| adc >>= MAX77843_MUIC_STATUS1_ADC_SHIFT; |
| |
| switch (group) { |
| case MAX77843_CABLE_GROUP_ADC: |
| if (adc == MAX77843_MUIC_ADC_OPEN) { |
| *attached = false; |
| cable_type = info->prev_cable_type; |
| info->prev_cable_type = MAX77843_MUIC_ADC_OPEN; |
| } else { |
| *attached = true; |
| cable_type = info->prev_cable_type = adc; |
| } |
| break; |
| case MAX77843_CABLE_GROUP_CHG: |
| chg_type = info->status[MAX77843_MUIC_STATUS2] & |
| MAX77843_MUIC_STATUS2_CHGTYP_MASK; |
| |
| /* Check GROUND accessory with charger cable */ |
| if (adc == MAX77843_MUIC_ADC_GROUND) { |
| if (chg_type == MAX77843_MUIC_CHG_NONE) { |
| /* |
| * The following state when charger cable is |
| * disconnected but the GROUND accessory still |
| * connected. |
| */ |
| *attached = false; |
| cable_type = info->prev_chg_type; |
| info->prev_chg_type = MAX77843_MUIC_CHG_NONE; |
| } else { |
| |
| /* |
| * The following state when charger cable is |
| * connected on the GROUND accessory. |
| */ |
| *attached = true; |
| cable_type = MAX77843_MUIC_CHG_GND; |
| info->prev_chg_type = MAX77843_MUIC_CHG_GND; |
| } |
| break; |
| } |
| |
| if (adc == MAX77843_MUIC_ADC_RESERVED_ACC_3) { /* SmartDock */ |
| if (chg_type == MAX77843_MUIC_CHG_NONE) { |
| *attached = false; |
| cable_type = info->prev_chg_type; |
| info->prev_chg_type = MAX77843_MUIC_CHG_NONE; |
| } else { |
| *attached = true; |
| cable_type = MAX77843_MUIC_CHG_DOCK; |
| info->prev_chg_type = MAX77843_MUIC_CHG_DOCK; |
| } |
| break; |
| } |
| |
| if (chg_type == MAX77843_MUIC_CHG_NONE) { |
| *attached = false; |
| cable_type = info->prev_chg_type; |
| info->prev_chg_type = MAX77843_MUIC_CHG_NONE; |
| } else { |
| *attached = true; |
| cable_type = info->prev_chg_type = chg_type; |
| } |
| break; |
| case MAX77843_CABLE_GROUP_ADC_GND: |
| if (adc == MAX77843_MUIC_ADC_OPEN) { |
| *attached = false; |
| cable_type = info->prev_gnd_type; |
| info->prev_gnd_type = MAX77843_MUIC_ADC_OPEN; |
| } else { |
| *attached = true; |
| |
| /* |
| * Offset|ADC1K|VBVolt| |
| * 0x1| 0| 0| USB-HOST |
| * 0x1| 0| 1| USB-HOST with VB |
| * 0x1| 1| 0| MHL |
| * 0x1| 1| 1| MHL with VB |
| */ |
| /* Get ADC1K register bit */ |
| gnd_type = (info->status[MAX77843_MUIC_STATUS1] & |
| MAX77843_MUIC_STATUS1_ADC1K_MASK); |
| |
| /* Get VBVolt register bit */ |
| gnd_type |= (info->status[MAX77843_MUIC_STATUS2] & |
| MAX77843_MUIC_STATUS2_VBVOLT_MASK); |
| gnd_type >>= MAX77843_MUIC_STATUS2_VBVOLT_SHIFT; |
| |
| /* Offset of GND cable */ |
| gnd_type |= MAX77843_MUIC_GND_USB_HOST; |
| cable_type = info->prev_gnd_type = gnd_type; |
| } |
| break; |
| default: |
| dev_err(info->dev, "Unknown cable group (%d)\n", group); |
| cable_type = -EINVAL; |
| break; |
| } |
| |
| return cable_type; |
| } |
| |
| static int max77843_muic_adc_gnd_handler(struct max77843_muic_info *info) |
| { |
| int ret, gnd_cable_type; |
| bool attached; |
| |
| gnd_cable_type = max77843_muic_get_cable_type(info, |
| MAX77843_CABLE_GROUP_ADC_GND, &attached); |
| dev_dbg(info->dev, "external connector is %s (gnd:0x%02x)\n", |
| attached ? "attached" : "detached", gnd_cable_type); |
| |
| switch (gnd_cable_type) { |
| case MAX77843_MUIC_GND_USB_HOST: |
| case MAX77843_MUIC_GND_USB_HOST_VB: |
| ret = max77843_muic_set_path(info, |
| MAX77843_MUIC_CONTROL1_SW_USB, |
| attached, false); |
| if (ret < 0) |
| return ret; |
| |
| extcon_set_state_sync(info->edev, EXTCON_USB_HOST, attached); |
| max77843_charger_set_otg_vbus(info, attached); |
| break; |
| case MAX77843_MUIC_GND_MHL_VB: |
| case MAX77843_MUIC_GND_MHL: |
| ret = max77843_muic_set_path(info, |
| MAX77843_MUIC_CONTROL1_SW_OPEN, |
| attached, false); |
| if (ret < 0) |
| return ret; |
| |
| extcon_set_state_sync(info->edev, EXTCON_DISP_MHL, attached); |
| break; |
| default: |
| dev_err(info->dev, "failed to detect %s accessory(gnd:0x%x)\n", |
| attached ? "attached" : "detached", gnd_cable_type); |
| return -EINVAL; |
| } |
| |
| return 0; |
| } |
| |
| static int max77843_muic_jig_handler(struct max77843_muic_info *info, |
| int cable_type, bool attached) |
| { |
| int ret; |
| u8 path = MAX77843_MUIC_CONTROL1_SW_OPEN; |
| |
| dev_dbg(info->dev, "external connector is %s (adc:0x%02x)\n", |
| attached ? "attached" : "detached", cable_type); |
| |
| switch (cable_type) { |
| case MAX77843_MUIC_ADC_FACTORY_MODE_USB_OFF: |
| case MAX77843_MUIC_ADC_FACTORY_MODE_USB_ON: |
| path = MAX77843_MUIC_CONTROL1_SW_USB; |
| break; |
| case MAX77843_MUIC_ADC_FACTORY_MODE_UART_OFF: |
| path = MAX77843_MUIC_CONTROL1_SW_UART; |
| break; |
| default: |
| return -EINVAL; |
| } |
| |
| ret = max77843_muic_set_path(info, path, attached, false); |
| if (ret < 0) |
| return ret; |
| |
| extcon_set_state_sync(info->edev, EXTCON_JIG, attached); |
| |
| return 0; |
| } |
| |
| static int max77843_muic_dock_handler(struct max77843_muic_info *info, |
| bool attached) |
| { |
| int ret; |
| |
| dev_dbg(info->dev, "external connector is %s (adc: 0x10)\n", |
| attached ? "attached" : "detached"); |
| |
| ret = max77843_muic_set_path(info, MAX77843_MUIC_CONTROL1_SW_USB, |
| attached, attached); |
| if (ret < 0) |
| return ret; |
| |
| extcon_set_state_sync(info->edev, EXTCON_DISP_MHL, attached); |
| extcon_set_state_sync(info->edev, EXTCON_USB_HOST, attached); |
| extcon_set_state_sync(info->edev, EXTCON_DOCK, attached); |
| |
| return 0; |
| } |
| |
| static int max77843_muic_adc_handler(struct max77843_muic_info *info) |
| { |
| int ret, cable_type; |
| bool attached; |
| |
| cable_type = max77843_muic_get_cable_type(info, |
| MAX77843_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 MAX77843_MUIC_ADC_RESERVED_ACC_3: /* SmartDock */ |
| ret = max77843_muic_dock_handler(info, attached); |
| if (ret < 0) |
| return ret; |
| break; |
| case MAX77843_MUIC_ADC_GROUND: |
| ret = max77843_muic_adc_gnd_handler(info); |
| if (ret < 0) |
| return ret; |
| break; |
| case MAX77843_MUIC_ADC_FACTORY_MODE_USB_OFF: |
| case MAX77843_MUIC_ADC_FACTORY_MODE_USB_ON: |
| case MAX77843_MUIC_ADC_FACTORY_MODE_UART_OFF: |
| ret = max77843_muic_jig_handler(info, cable_type, attached); |
| if (ret < 0) |
| return ret; |
| break; |
| case MAX77843_MUIC_ADC_SEND_END_BUTTON: |
| case MAX77843_MUIC_ADC_REMOTE_S1_BUTTON: |
| case MAX77843_MUIC_ADC_REMOTE_S2_BUTTON: |
| case MAX77843_MUIC_ADC_REMOTE_S3_BUTTON: |
| case MAX77843_MUIC_ADC_REMOTE_S4_BUTTON: |
| case MAX77843_MUIC_ADC_REMOTE_S5_BUTTON: |
| case MAX77843_MUIC_ADC_REMOTE_S6_BUTTON: |
| case MAX77843_MUIC_ADC_REMOTE_S7_BUTTON: |
| case MAX77843_MUIC_ADC_REMOTE_S8_BUTTON: |
| case MAX77843_MUIC_ADC_REMOTE_S9_BUTTON: |
| case MAX77843_MUIC_ADC_REMOTE_S10_BUTTON: |
| case MAX77843_MUIC_ADC_REMOTE_S11_BUTTON: |
| case MAX77843_MUIC_ADC_REMOTE_S12_BUTTON: |
| case MAX77843_MUIC_ADC_RESERVED_ACC_1: |
| case MAX77843_MUIC_ADC_RESERVED_ACC_2: |
| case MAX77843_MUIC_ADC_RESERVED_ACC_4: |
| case MAX77843_MUIC_ADC_RESERVED_ACC_5: |
| case MAX77843_MUIC_ADC_AUDIO_DEVICE_TYPE2: |
| case MAX77843_MUIC_ADC_PHONE_POWERED_DEV: |
| case MAX77843_MUIC_ADC_TTY_CONVERTER: |
| case MAX77843_MUIC_ADC_UART_CABLE: |
| case MAX77843_MUIC_ADC_CEA936A_TYPE1_CHG: |
| case MAX77843_MUIC_ADC_AV_CABLE_NOLOAD: |
| case MAX77843_MUIC_ADC_CEA936A_TYPE2_CHG: |
| case MAX77843_MUIC_ADC_FACTORY_MODE_UART_ON: |
| case MAX77843_MUIC_ADC_AUDIO_DEVICE_TYPE1: |
| case MAX77843_MUIC_ADC_OPEN: |
| dev_err(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 max77843_muic_chg_handler(struct max77843_muic_info *info) |
| { |
| int ret, chg_type, gnd_type; |
| bool attached; |
| |
| chg_type = max77843_muic_get_cable_type(info, |
| MAX77843_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 MAX77843_MUIC_CHG_USB: |
| ret = max77843_muic_set_path(info, |
| MAX77843_MUIC_CONTROL1_SW_USB, |
| attached, false); |
| 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 MAX77843_MUIC_CHG_DOWNSTREAM: |
| ret = max77843_muic_set_path(info, |
| MAX77843_MUIC_CONTROL1_SW_OPEN, |
| attached, false); |
| if (ret < 0) |
| return ret; |
| |
| extcon_set_state_sync(info->edev, EXTCON_CHG_USB_CDP, |
| attached); |
| break; |
| case MAX77843_MUIC_CHG_DEDICATED: |
| ret = max77843_muic_set_path(info, |
| MAX77843_MUIC_CONTROL1_SW_OPEN, |
| attached, false); |
| if (ret < 0) |
| return ret; |
| |
| extcon_set_state_sync(info->edev, EXTCON_CHG_USB_DCP, |
| attached); |
| break; |
| case MAX77843_MUIC_CHG_SPECIAL_500MA: |
| ret = max77843_muic_set_path(info, |
| MAX77843_MUIC_CONTROL1_SW_OPEN, |
| attached, false); |
| if (ret < 0) |
| return ret; |
| |
| extcon_set_state_sync(info->edev, EXTCON_CHG_USB_SLOW, |
| attached); |
| break; |
| case MAX77843_MUIC_CHG_SPECIAL_1A: |
| ret = max77843_muic_set_path(info, |
| MAX77843_MUIC_CONTROL1_SW_OPEN, |
| attached, false); |
| if (ret < 0) |
| return ret; |
| |
| extcon_set_state_sync(info->edev, EXTCON_CHG_USB_FAST, |
| attached); |
| break; |
| case MAX77843_MUIC_CHG_GND: |
| gnd_type = max77843_muic_get_cable_type(info, |
| MAX77843_CABLE_GROUP_ADC_GND, &attached); |
| |
| /* Charger cable on MHL accessory is attach or detach */ |
| if (gnd_type == MAX77843_MUIC_GND_MHL_VB) |
| extcon_set_state_sync(info->edev, EXTCON_CHG_USB_DCP, |
| true); |
| else if (gnd_type == MAX77843_MUIC_GND_MHL) |
| extcon_set_state_sync(info->edev, EXTCON_CHG_USB_DCP, |
| false); |
| break; |
| case MAX77843_MUIC_CHG_DOCK: |
| extcon_set_state_sync(info->edev, EXTCON_CHG_USB_DCP, attached); |
| break; |
| case MAX77843_MUIC_CHG_NONE: |
| break; |
| default: |
| dev_err(info->dev, |
| "failed to detect %s accessory (chg_type:0x%x)\n", |
| attached ? "attached" : "detached", chg_type); |
| |
| max77843_muic_set_path(info, MAX77843_MUIC_CONTROL1_SW_OPEN, |
| attached, false); |
| return -EINVAL; |
| } |
| |
| return 0; |
| } |
| |
| static void max77843_muic_irq_work(struct work_struct *work) |
| { |
| struct max77843_muic_info *info = container_of(work, |
| struct max77843_muic_info, irq_work); |
| struct max77693_dev *max77843 = info->max77843; |
| int ret = 0; |
| |
| mutex_lock(&info->mutex); |
| |
| ret = regmap_bulk_read(max77843->regmap_muic, |
| MAX77843_MUIC_REG_STATUS1, info->status, |
| MAX77843_MUIC_STATUS_NUM); |
| if (ret) { |
| dev_err(info->dev, "Cannot read STATUS registers\n"); |
| mutex_unlock(&info->mutex); |
| return; |
| } |
| |
| if (info->irq_adc) { |
| ret = max77843_muic_adc_handler(info); |
| if (ret) |
| dev_err(info->dev, "Unknown cable type\n"); |
| info->irq_adc = false; |
| } |
| |
| if (info->irq_chg) { |
| ret = max77843_muic_chg_handler(info); |
| if (ret) |
| dev_err(info->dev, "Unknown charger type\n"); |
| info->irq_chg = false; |
| } |
| |
| mutex_unlock(&info->mutex); |
| } |
| |
| static irqreturn_t max77843_muic_irq_handler(int irq, void *data) |
| { |
| struct max77843_muic_info *info = data; |
| int i, irq_type = -1; |
| |
| for (i = 0; i < ARRAY_SIZE(max77843_muic_irqs); i++) |
| if (irq == max77843_muic_irqs[i].virq) |
| irq_type = max77843_muic_irqs[i].irq; |
| |
| switch (irq_type) { |
| case MAX77843_MUIC_IRQ_INT1_ADC: |
| case MAX77843_MUIC_IRQ_INT1_ADCERROR: |
| case MAX77843_MUIC_IRQ_INT1_ADC1K: |
| info->irq_adc = true; |
| break; |
| case MAX77843_MUIC_IRQ_INT2_CHGTYP: |
| case MAX77843_MUIC_IRQ_INT2_CHGDETRUN: |
| case MAX77843_MUIC_IRQ_INT2_DCDTMR: |
| case MAX77843_MUIC_IRQ_INT2_DXOVP: |
| case MAX77843_MUIC_IRQ_INT2_VBVOLT: |
| info->irq_chg = true; |
| break; |
| case MAX77843_MUIC_IRQ_INT3_VBADC: |
| case MAX77843_MUIC_IRQ_INT3_VDNMON: |
| case MAX77843_MUIC_IRQ_INT3_DNRES: |
| case MAX77843_MUIC_IRQ_INT3_MPNACK: |
| case MAX77843_MUIC_IRQ_INT3_MRXBUFOW: |
| case MAX77843_MUIC_IRQ_INT3_MRXTRF: |
| case MAX77843_MUIC_IRQ_INT3_MRXPERR: |
| case MAX77843_MUIC_IRQ_INT3_MRXRDY: |
| break; |
| default: |
| dev_err(info->dev, "Cannot recognize IRQ(%d)\n", irq_type); |
| break; |
| } |
| |
| schedule_work(&info->irq_work); |
| |
| return IRQ_HANDLED; |
| } |
| |
| static void max77843_muic_detect_cable_wq(struct work_struct *work) |
| { |
| struct max77843_muic_info *info = container_of(to_delayed_work(work), |
| struct max77843_muic_info, wq_detcable); |
| struct max77693_dev *max77843 = info->max77843; |
| int chg_type, adc, ret; |
| bool attached; |
| |
| mutex_lock(&info->mutex); |
| |
| ret = regmap_bulk_read(max77843->regmap_muic, |
| MAX77843_MUIC_REG_STATUS1, info->status, |
| MAX77843_MUIC_STATUS_NUM); |
| if (ret) { |
| dev_err(info->dev, "Cannot read STATUS registers\n"); |
| goto err_cable_wq; |
| } |
| |
| adc = max77843_muic_get_cable_type(info, |
| MAX77843_CABLE_GROUP_ADC, &attached); |
| if (attached && adc != MAX77843_MUIC_ADC_OPEN) { |
| ret = max77843_muic_adc_handler(info); |
| if (ret < 0) { |
| dev_err(info->dev, "Cannot detect accessory\n"); |
| goto err_cable_wq; |
| } |
| } |
| |
| chg_type = max77843_muic_get_cable_type(info, |
| MAX77843_CABLE_GROUP_CHG, &attached); |
| if (attached && chg_type != MAX77843_MUIC_CHG_NONE) { |
| ret = max77843_muic_chg_handler(info); |
| if (ret < 0) { |
| dev_err(info->dev, "Cannot detect charger accessory\n"); |
| goto err_cable_wq; |
| } |
| } |
| |
| err_cable_wq: |
| mutex_unlock(&info->mutex); |
| } |
| |
| static int max77843_muic_set_debounce_time(struct max77843_muic_info *info, |
| enum max77843_muic_adc_debounce_time time) |
| { |
| struct max77693_dev *max77843 = info->max77843; |
| int ret; |
| |
| switch (time) { |
| case MAX77843_DEBOUNCE_TIME_5MS: |
| case MAX77843_DEBOUNCE_TIME_10MS: |
| case MAX77843_DEBOUNCE_TIME_25MS: |
| case MAX77843_DEBOUNCE_TIME_38_62MS: |
| ret = regmap_update_bits(max77843->regmap_muic, |
| MAX77843_MUIC_REG_CONTROL4, |
| MAX77843_MUIC_CONTROL4_ADCDBSET_MASK, |
| time << MAX77843_MUIC_CONTROL4_ADCDBSET_SHIFT); |
| if (ret < 0) { |
| dev_err(info->dev, "Cannot write MUIC regmap\n"); |
| return ret; |
| } |
| break; |
| default: |
| dev_err(info->dev, "Invalid ADC debounce time\n"); |
| return -EINVAL; |
| } |
| |
| return 0; |
| } |
| |
| static int max77843_init_muic_regmap(struct max77693_dev *max77843) |
| { |
| int ret; |
| |
| max77843->i2c_muic = i2c_new_dummy(max77843->i2c->adapter, |
| I2C_ADDR_MUIC); |
| if (!max77843->i2c_muic) { |
| dev_err(&max77843->i2c->dev, |
| "Cannot allocate I2C device for MUIC\n"); |
| return -ENOMEM; |
| } |
| |
| i2c_set_clientdata(max77843->i2c_muic, max77843); |
| |
| max77843->regmap_muic = devm_regmap_init_i2c(max77843->i2c_muic, |
| &max77843_muic_regmap_config); |
| if (IS_ERR(max77843->regmap_muic)) { |
| ret = PTR_ERR(max77843->regmap_muic); |
| goto err_muic_i2c; |
| } |
| |
| ret = regmap_add_irq_chip(max77843->regmap_muic, max77843->irq, |
| IRQF_TRIGGER_LOW | IRQF_ONESHOT | IRQF_SHARED, |
| 0, &max77843_muic_irq_chip, &max77843->irq_data_muic); |
| if (ret < 0) { |
| dev_err(&max77843->i2c->dev, "Cannot add MUIC IRQ chip\n"); |
| goto err_muic_i2c; |
| } |
| |
| return 0; |
| |
| err_muic_i2c: |
| i2c_unregister_device(max77843->i2c_muic); |
| |
| return ret; |
| } |
| |
| static int max77843_muic_probe(struct platform_device *pdev) |
| { |
| struct max77693_dev *max77843 = dev_get_drvdata(pdev->dev.parent); |
| struct max77843_muic_info *info; |
| unsigned int id; |
| int i, ret; |
| |
| info = devm_kzalloc(&pdev->dev, sizeof(*info), GFP_KERNEL); |
| if (!info) |
| return -ENOMEM; |
| |
| info->dev = &pdev->dev; |
| info->max77843 = max77843; |
| |
| platform_set_drvdata(pdev, info); |
| mutex_init(&info->mutex); |
| |
| /* Initialize i2c and regmap */ |
| ret = max77843_init_muic_regmap(max77843); |
| if (ret) { |
| dev_err(&pdev->dev, "Failed to init MUIC regmap\n"); |
| return ret; |
| } |
| |
| /* Turn off auto detection configuration */ |
| ret = regmap_update_bits(max77843->regmap_muic, |
| MAX77843_MUIC_REG_CONTROL4, |
| MAX77843_MUIC_CONTROL4_USBAUTO_MASK | |
| MAX77843_MUIC_CONTROL4_FCTAUTO_MASK, |
| CONTROL4_AUTO_DISABLE); |
| |
| /* Initialize extcon device */ |
| info->edev = devm_extcon_dev_allocate(&pdev->dev, |
| max77843_extcon_cable); |
| if (IS_ERR(info->edev)) { |
| dev_err(&pdev->dev, "Failed to allocate memory for extcon\n"); |
| ret = -ENODEV; |
| goto err_muic_irq; |
| } |
| |
| ret = devm_extcon_dev_register(&pdev->dev, info->edev); |
| if (ret) { |
| dev_err(&pdev->dev, "Failed to register extcon device\n"); |
| goto err_muic_irq; |
| } |
| |
| /* Set ADC debounce time */ |
| max77843_muic_set_debounce_time(info, MAX77843_DEBOUNCE_TIME_25MS); |
| |
| /* Set initial path for UART */ |
| max77843_muic_set_path(info, MAX77843_MUIC_CONTROL1_SW_UART, true, |
| false); |
| |
| /* Check revision number of MUIC device */ |
| ret = regmap_read(max77843->regmap_muic, MAX77843_MUIC_REG_ID, &id); |
| if (ret < 0) { |
| dev_err(&pdev->dev, "Failed to read revision number\n"); |
| goto err_muic_irq; |
| } |
| dev_info(info->dev, "MUIC device ID : 0x%x\n", id); |
| |
| /* Support virtual irq domain for max77843 MUIC device */ |
| INIT_WORK(&info->irq_work, max77843_muic_irq_work); |
| |
| /* Clear IRQ bits before request IRQs */ |
| ret = regmap_bulk_read(max77843->regmap_muic, |
| MAX77843_MUIC_REG_INT1, info->status, |
| MAX77843_MUIC_STATUS_NUM); |
| if (ret) { |
| dev_err(&pdev->dev, "Failed to Clear IRQ bits\n"); |
| goto err_muic_irq; |
| } |
| |
| for (i = 0; i < ARRAY_SIZE(max77843_muic_irqs); i++) { |
| struct max77843_muic_irq *muic_irq = &max77843_muic_irqs[i]; |
| int virq = 0; |
| |
| virq = regmap_irq_get_virq(max77843->irq_data_muic, |
| muic_irq->irq); |
| if (virq <= 0) { |
| ret = -EINVAL; |
| goto err_muic_irq; |
| } |
| muic_irq->virq = virq; |
| |
| ret = devm_request_threaded_irq(&pdev->dev, virq, NULL, |
| max77843_muic_irq_handler, IRQF_NO_SUSPEND, |
| muic_irq->name, info); |
| if (ret) { |
| dev_err(&pdev->dev, |
| "Failed to request irq (IRQ: %d, error: %d)\n", |
| muic_irq->irq, ret); |
| goto err_muic_irq; |
| } |
| } |
| |
| /* Detect accessory after completing the initialization of platform */ |
| INIT_DELAYED_WORK(&info->wq_detcable, max77843_muic_detect_cable_wq); |
| queue_delayed_work(system_power_efficient_wq, |
| &info->wq_detcable, msecs_to_jiffies(DELAY_MS_DEFAULT)); |
| |
| return 0; |
| |
| err_muic_irq: |
| regmap_del_irq_chip(max77843->irq, max77843->irq_data_muic); |
| i2c_unregister_device(max77843->i2c_muic); |
| |
| return ret; |
| } |
| |
| static int max77843_muic_remove(struct platform_device *pdev) |
| { |
| struct max77843_muic_info *info = platform_get_drvdata(pdev); |
| struct max77693_dev *max77843 = info->max77843; |
| |
| cancel_work_sync(&info->irq_work); |
| regmap_del_irq_chip(max77843->irq, max77843->irq_data_muic); |
| i2c_unregister_device(max77843->i2c_muic); |
| |
| return 0; |
| } |
| |
| static const struct platform_device_id max77843_muic_id[] = { |
| { "max77843-muic", }, |
| { /* sentinel */ }, |
| }; |
| MODULE_DEVICE_TABLE(platform, max77843_muic_id); |
| |
| static struct platform_driver max77843_muic_driver = { |
| .driver = { |
| .name = "max77843-muic", |
| }, |
| .probe = max77843_muic_probe, |
| .remove = max77843_muic_remove, |
| .id_table = max77843_muic_id, |
| }; |
| |
| static int __init max77843_muic_init(void) |
| { |
| return platform_driver_register(&max77843_muic_driver); |
| } |
| subsys_initcall(max77843_muic_init); |
| |
| MODULE_DESCRIPTION("Maxim MAX77843 Extcon driver"); |
| MODULE_AUTHOR("Jaewon Kim <jaewon02.kim@samsung.com>"); |
| MODULE_LICENSE("GPL"); |
