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linux-next/drivers/extcon/extcon-max77693.c
Andrzej Hajda cbc46603df extcon: max77693: fix handling return value of regmap_irq_get_virq 
The function can return negative values, so its result should
be assigned to signed variable.

Signed-off-by: Andrzej Hajda <a.hajda@samsung.com>
Suggested-by: Krzysztof Kozlowski <k.kozlowski@samsung.com>
Reviewed-by: Krzysztof Kozlowski <k.kozlowski@samsung.com>
Signed-off-by: Chanwoo Choi <cw00.choi@samsung.com>
2015-12-15 10:02:23 +09:00

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/*
* extcon-max77693.c - MAX77693 extcon driver to support MAX77693 MUIC
*
* Copyright (C) 2012 Samsung Electrnoics
* Chanwoo Choi <cw00.choi@samsung.com>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*/
#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.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_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 = 0;
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_cable_state_(info->edev, EXTCON_DOCK, attached);
extcon_set_cable_state_(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_cable_state_(info->edev, EXTCON_USB, 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_cable_state_(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_cable_state_(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_cable_state_(info->edev, EXTCON_USB, attached);
break;
case MAX77693_MUIC_GND_MHL:
case MAX77693_MUIC_GND_MHL_VB:
/* MHL or MHL with USB/TA cable */
extcon_set_cable_state_(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_cable_state_(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_cable_state_(info->edev, EXTCON_CHG_USB_DCP,
attached);
if (!cable_attached)
extcon_set_cable_state_(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_cable_state_(info->edev, EXTCON_USB,
attached);
if (!cable_attached)
extcon_set_cable_state_(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_cable_state_(info->edev, EXTCON_DOCK,
attached);
extcon_set_cable_state_(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_cable_state_(info->edev, EXTCON_USB,
attached);
break;
case MAX77693_CHARGER_TYPE_DEDICATED_CHG:
/* Only TA cable */
extcon_set_cable_state_(info->edev, EXTCON_CHG_USB_DCP,
attached);
break;
}
break;
case MAX77693_CHARGER_TYPE_DOWNSTREAM_PORT:
extcon_set_cable_state_(info->edev, EXTCON_CHG_USB_CDP,
attached);
break;
case MAX77693_CHARGER_TYPE_APPLE_500MA:
extcon_set_cable_state_(info->edev, EXTCON_CHG_USB_SLOW,
attached);
break;
case MAX77693_CHARGER_TYPE_APPLE_1A_2A:
extcon_set_cable_state_(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 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 */
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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