| Author | Tokens | Token Proportion | Commits | Commit Proportion |
|---|---|---|---|---|
| Jaewon Kim | 3308 | 87.98% | 2 | 11.11% |
| Marek Szyprowski | 348 | 9.26% | 3 | 16.67% |
| Chanwoo Choi | 62 | 1.65% | 7 | 38.89% |
| Krzysztof Kozlowski | 35 | 0.93% | 3 | 16.67% |
| Srikant Ritolia | 4 | 0.11% | 1 | 5.56% |
| Dan Carpenter | 3 | 0.08% | 2 | 11.11% |
| Total | 3760 | 18 |
// 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 cable_type; bool attached; 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 when JIG is connected to get serial logs */ 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_muic_irq; } cable_type = max77843_muic_get_cable_type(info, MAX77843_CABLE_GROUP_ADC, &attached); if (attached && cable_type == MAX77843_MUIC_ADC_FACTORY_MODE_UART_OFF) 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");
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