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06bed0afa2
linux/drivers/extcon/extcon-max77693.c
Chanwoo Choi 06bed0afa2 extcon: max77693: Add support MHL_TA cable for charging battery 
This patch support MHL_TA cable for charging battery. The MHL_TA
cable include MHL with TA cable or MHL with micro USB cable. When
MHL with TA/USB cable is attached, extcon-max77693 driver detect
two interrupt for handling precise operation according to each cable
(MHL and TA/USB cable).

Signed-off-by: Chanwoo Choi <cw00.choi@samsung.com>
Signed-off-by: Myungjoo Ham <myungjoo.ham@samsung.com>
2013-01-15 15:42:15 +09:00

879 lines
24 KiB
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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/interrupt.h>
#include <linux/err.h>
#include <linux/platform_device.h>
#include <linux/mfd/max77693.h>
#include <linux/mfd/max77693-private.h>
#include <linux/extcon.h>
#include <linux/regmap.h>
#include <linux/irqdomain.h>
#define DEV_NAME "max77693-muic"
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;
u8 status[2];
int irq;
struct work_struct irq_work;
struct mutex mutex;
};
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 */
MAX77693_MUIC_GND_USB_OTG = 0x100, /* ADC:0x0, VBVolot:0, ADCLow:0, ADC1K:0 */
MAX77693_MUIC_GND_USB_OTG_VB = 0x104, /* ADC:0x0, VBVolot:1, ADCLow:0, ADC1K:0 */
MAX77693_MUIC_GND_AV_CABLE_LOAD = 0x102,/* ADC:0x0, VBVolot:0, ADCLow:1, ADC1K:0 */
MAX77693_MUIC_GND_MHL = 0x103, /* ADC:0x0, VBVolot:0, ADCLow:1, ADC1K:1 */
MAX77693_MUIC_GND_MHL_VB = 0x107, /* ADC:0x0, VBVolot:1, ADCLow:1, ADC1K:1 */
};
/* MAX77693 MUIC device support below list of accessories(external connector) */
enum {
EXTCON_CABLE_USB = 0,
EXTCON_CABLE_USB_HOST,
EXTCON_CABLE_TA,
EXTCON_CABLE_FAST_CHARGER,
EXTCON_CABLE_SLOW_CHARGER,
EXTCON_CABLE_CHARGE_DOWNSTREAM,
EXTCON_CABLE_MHL,
EXTCON_CABLE_MHL_TA,
EXTCON_CABLE_AUDIO_VIDEO_LOAD,
EXTCON_CABLE_AUDIO_VIDEO_NOLOAD,
EXTCON_CABLE_JIG,
_EXTCON_CABLE_NUM,
};
const char *max77693_extcon_cable[] = {
[EXTCON_CABLE_USB] = "USB",
[EXTCON_CABLE_USB_HOST] = "USB-Host",
[EXTCON_CABLE_TA] = "TA",
[EXTCON_CABLE_FAST_CHARGER] = "Fast-charger",
[EXTCON_CABLE_SLOW_CHARGER] = "Slow-charger",
[EXTCON_CABLE_CHARGE_DOWNSTREAM] = "Charge-downstream",
[EXTCON_CABLE_MHL] = "MHL",
[EXTCON_CABLE_MHL_TA] = "MHL_TA",
[EXTCON_CABLE_AUDIO_VIDEO_LOAD] = "Audio-video-load",
[EXTCON_CABLE_AUDIO_VIDEO_NOLOAD] = "Audio-video-noload",
[EXTCON_CABLE_JIG] = "JIG",
NULL,
};
/*
* 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:
ret = max77693_update_reg(info->max77693->regmap_muic,
MAX77693_MUIC_REG_CTRL3,
time << CONTROL3_ADCDBSET_SHIFT,
CONTROL3_ADCDBSET_MASK);
if (ret)
dev_err(info->dev, "failed to set ADC debounce time\n");
break;
default:
dev_err(info->dev, "invalid ADC debounce time\n");
ret = -EINVAL;
break;
}
return ret;
};
/*
* 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;
u8 ctrl1, ctrl2 = 0;
if (attached)
ctrl1 = val;
else
ctrl1 = CONTROL1_SW_OPEN;
ret = max77693_update_reg(info->max77693->regmap_muic,
MAX77693_MUIC_REG_CTRL1, ctrl1, COMP_SW_MASK);
if (ret < 0) {
dev_err(info->dev, "failed to update MUIC register\n");
goto out;
}
if (attached)
ctrl2 |= CONTROL2_CPEN_MASK; /* LowPwr=0, CPEn=1 */
else
ctrl2 |= CONTROL2_LOWPWR_MASK; /* LowPwr=1, CPEn=0 */
ret = max77693_update_reg(info->max77693->regmap_muic,
MAX77693_MUIC_REG_CTRL2, ctrl2,
CONTROL2_LOWPWR_MASK | CONTROL2_CPEN_MASK);
if (ret < 0) {
dev_err(info->dev, "failed to update MUIC register\n");
goto out;
}
dev_info(info->dev,
"CONTROL1 : 0x%02x, CONTROL2 : 0x%02x, state : %s\n",
ctrl1, ctrl2, attached ? "attached" : "detached");
out:
return ret;
}
/*
* 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] & STATUS1_ADC_MASK;
adc >>= 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] & STATUS1_ADC_MASK;
adc >>= 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] & STATUS1_ADCLOW_MASK;
adclow >>= STATUS1_ADCLOW_SHIFT;
adc1k = info->status[0] & STATUS1_ADC1K_MASK;
adc1k >>= STATUS1_ADC1K_SHIFT;
vbvolt = info->status[1] & STATUS2_VBVOLT_MASK;
vbvolt >>= STATUS2_VBVOLT_SHIFT;
/**
* [0x1][VBVolt][ADCLow][ADC1K]
* [0x1 0 0 0 ] : USB_OTG
* [0x1 1 0 0 ] : USB_OTG_VB
* [0x1 0 1 0 ] : Audio Video Cable with load
* [0x1 0 1 1 ] : MHL without charging connector
* [0x1 1 1 1 ] : MHL with charging connector
*/
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] & STATUS2_CHGTYP_MASK;
chg_type >>= 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] & STATUS1_ADC_MASK;
adc >>= STATUS1_ADC_SHIFT;
chg_type = info->status[1] & STATUS2_CHGTYP_MASK;
chg_type >>= 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] & STATUS2_VBVOLT_MASK;
vbvolt >>= 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_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_OTG:
case MAX77693_MUIC_GND_USB_OTG_VB:
/* USB_OTG, PATH: AP_USB */
ret = max77693_muic_set_path(info, CONTROL1_SW_USB, attached);
if (ret < 0)
goto out;
extcon_set_cable_state(info->edev, "USB-Host", attached);
break;
case MAX77693_MUIC_GND_AV_CABLE_LOAD:
/* Audio Video Cable with load, PATH:AUDIO */
ret = max77693_muic_set_path(info, CONTROL1_SW_AUDIO, attached);
if (ret < 0)
goto out;
extcon_set_cable_state(info->edev,
"Audio-video-load", 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, "MHL", attached);
break;
default:
dev_err(info->dev, "failed to detect %s accessory\n",
attached ? "attached" : "detached");
ret = -EINVAL;
break;
}
out:
return ret;
}
static int max77693_muic_adc_handler(struct max77693_muic_info *info)
{
int cable_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_OTG/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:
/* JIG */
ret = max77693_muic_set_path(info, CONTROL1_SW_UART, attached);
if (ret < 0)
goto out;
extcon_set_cable_state(info->edev, "JIG", attached);
break;
case MAX77693_MUIC_ADC_FACTORY_MODE_UART_ON:
case MAX77693_MUIC_ADC_AUDIO_MODE_REMOTE:
/* Audio Video cable with no-load */
ret = max77693_muic_set_path(info, CONTROL1_SW_AUDIO, attached);
if (ret < 0)
goto out;
extcon_set_cable_state(info->edev,
"Audio-video-noload", attached);
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_S3_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_S7_BUTTON:
case MAX77693_MUIC_ADC_REMOTE_S8_BUTTON:
case MAX77693_MUIC_ADC_REMOTE_S9_BUTTON:
case MAX77693_MUIC_ADC_REMOTE_S10_BUTTON:
case MAX77693_MUIC_ADC_REMOTE_S11_BUTTON:
case MAX77693_MUIC_ADC_REMOTE_S12_BUTTON:
case MAX77693_MUIC_ADC_RESERVED_ACC_1:
case MAX77693_MUIC_ADC_RESERVED_ACC_2:
case MAX77693_MUIC_ADC_RESERVED_ACC_3:
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_AV_CABLE_NOLOAD:
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);
goto out;
default:
dev_err(info->dev,
"failed to detect %s accessory (adc:0x%x)\n",
attached ? "attached" : "detached", cable_type);
ret = -EINVAL;
goto out;
}
out:
return ret;
}
static int max77693_muic_chg_handler(struct max77693_muic_info *info)
{
int chg_type;
int cable_type_gnd;
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:
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:
/*
* USB/TA with MHL cable
* - MHL cable, which connect micro USB or TA cable,
* is used to charging battery. So, extcon driver check
* charging type whether micro USB or TA cable is
* connected to MHL cable when extcon driver detect MHL
* cable.
*/
extcon_set_cable_state(info->edev, "MHL_TA", attached);
if (!cable_attached)
extcon_set_cable_state(info->edev,
"MHL", false);
break;
default:
/* Only USB cable, PATH:AP_USB */
ret = max77693_muic_set_path(info, CONTROL1_SW_USB,
attached);
if (ret < 0)
goto out;
extcon_set_cable_state(info->edev, "USB", attached);
}
break;
case MAX77693_CHARGER_TYPE_DOWNSTREAM_PORT:
extcon_set_cable_state(info->edev,
"Charge-downstream", attached);
break;
case MAX77693_CHARGER_TYPE_DEDICATED_CHG:
extcon_set_cable_state(info->edev, "TA", attached);
break;
case MAX77693_CHARGER_TYPE_APPLE_500MA:
extcon_set_cable_state(info->edev, "Slow-charger", attached);
break;
case MAX77693_CHARGER_TYPE_APPLE_1A_2A:
extcon_set_cable_state(info->edev, "Fast-charger", 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);
ret = -EINVAL;
goto out;
}
out:
return ret;
}
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 = max77693_bulk_read(info->max77693->regmap_muic,
MAX77693_MUIC_REG_STATUS1, 2, info->status);
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);
break;
}
if (ret < 0)
dev_err(info->dev, "failed to handle MUIC interrupt\n");
mutex_unlock(&info->mutex);
return;
}
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 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 = max77693_bulk_read(info->max77693->regmap_muic,
MAX77693_MUIC_REG_STATUS1, 2, info->status);
if (ret) {
dev_err(info->dev, "failed to read MUIC register\n");
mutex_unlock(&info->mutex);
return -EINVAL;
}
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");
}
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;
}
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_platform_data *muic_pdata = pdata->muic_data;
struct max77693_muic_info *info;
int ret, i;
u8 id;
info = devm_kzalloc(&pdev->dev, sizeof(struct max77693_muic_info),
GFP_KERNEL);
if (!info) {
dev_err(&pdev->dev, "failed to allocate memory\n");
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->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;
}
}
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];
unsigned int virq = 0;
virq = irq_create_mapping(max77693->irq_domain, muic_irq->irq);
if (!virq) {
ret = -EINVAL;
goto err_irq;
}
muic_irq->virq = virq;
ret = request_threaded_irq(virq, NULL,
max77693_muic_irq_handler,
IRQF_ONESHOT, muic_irq->name, info);
if (ret) {
dev_err(&pdev->dev,
"failed: irq request (IRQ: %d,"
" error :%d)\n",
muic_irq->irq, ret);
goto err_irq;
}
}
/* Initialize extcon device */
info->edev = devm_kzalloc(&pdev->dev, sizeof(struct extcon_dev),
GFP_KERNEL);
if (!info->edev) {
dev_err(&pdev->dev, "failed to allocate memory for extcon\n");
ret = -ENOMEM;
goto err_irq;
}
info->edev->name = DEV_NAME;
info->edev->supported_cable = max77693_extcon_cable;
ret = extcon_dev_register(info->edev, NULL);
if (ret) {
dev_err(&pdev->dev, "failed to register extcon device\n");
goto err_irq;
}
/* Initialize MUIC register by using platform data */
for (i = 0 ; i < muic_pdata->num_init_data ; i++) {
enum max77693_irq_source irq_src = MAX77693_IRQ_GROUP_NR;
max77693_write_reg(info->max77693->regmap_muic,
muic_pdata->init_data[i].addr,
muic_pdata->init_data[i].data);
switch (muic_pdata->init_data[i].addr) {
case MAX77693_MUIC_REG_INTMASK1:
irq_src = MUIC_INT1;
break;
case MAX77693_MUIC_REG_INTMASK2:
irq_src = MUIC_INT2;
break;
case MAX77693_MUIC_REG_INTMASK3:
irq_src = MUIC_INT3;
break;
}
if (irq_src < MAX77693_IRQ_GROUP_NR)
info->max77693->irq_masks_cur[irq_src]
= muic_pdata->init_data[i].data;
}
/* Check revision number of MUIC device*/
ret = max77693_read_reg(info->max77693->regmap_muic,
MAX77693_MUIC_REG_ID, &id);
if (ret < 0) {
dev_err(&pdev->dev, "failed to read revision number\n");
goto err_irq;
}
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 on boot */
max77693_muic_detect_accessory(info);
return ret;
err_irq:
while (--i >= 0)
free_irq(muic_irqs[i].virq, info);
return ret;
}
static int max77693_muic_remove(struct platform_device *pdev)
{
struct max77693_muic_info *info = platform_get_drvdata(pdev);
int i;
for (i = 0; i < ARRAY_SIZE(muic_irqs); i++)
free_irq(muic_irqs[i].virq, info);
cancel_work_sync(&info->irq_work);
extcon_dev_unregister(info->edev);
return 0;
}
static struct platform_driver max77693_muic_driver = {
.driver = {
.name = DEV_NAME,
.owner = THIS_MODULE,
},
.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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