// 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,
.unmask_base = MAX77843_MUIC_REG_INTMASK1,
.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_device(max77843->i2c->adapter,
I2C_ADDR_MUIC);
if (IS_ERR(max77843->i2c_muic)) {
dev_err(&max77843->i2c->dev,
"Cannot allocate I2C device for MUIC\n");
return PTR_ERR(max77843->i2c_muic);
}
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 = PTR_ERR(info->edev);
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 void 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);
}
static const struct platform_device_id max77843_muic_id[] = {
{ "max77843-muic", },
{ /* sentinel */ },
};
MODULE_DEVICE_TABLE(platform, max77843_muic_id);
static const struct of_device_id of_max77843_muic_dt_match[] = {
{ .compatible = "maxim,max77843-muic", },
{ /* sentinel */ },
};
MODULE_DEVICE_TABLE(of, of_max77843_muic_dt_match);
static struct platform_driver max77843_muic_driver = {
.driver = {
.name = "max77843-muic",
.of_match_table = of_max77843_muic_dt_match,
},
.probe = max77843_muic_probe,
.remove_new = 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");
