/*
* 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"
/* MAX77693 MUIC - STATUS1~3 Register */
#define STATUS1_ADC_SHIFT (0)
#define STATUS1_ADCLOW_SHIFT (5)
#define STATUS1_ADCERR_SHIFT (6)
#define STATUS1_ADC1K_SHIFT (7)
#define STATUS1_ADC_MASK (0x1f << STATUS1_ADC_SHIFT)
#define STATUS1_ADCLOW_MASK (0x1 << STATUS1_ADCLOW_SHIFT)
#define STATUS1_ADCERR_MASK (0x1 << STATUS1_ADCERR_SHIFT)
#define STATUS1_ADC1K_MASK (0x1 << STATUS1_ADC1K_SHIFT)
#define STATUS2_CHGTYP_SHIFT (0)
#define STATUS2_CHGDETRUN_SHIFT (3)
#define STATUS2_DCDTMR_SHIFT (4)
#define STATUS2_DXOVP_SHIFT (5)
#define STATUS2_VBVOLT_SHIFT (6)
#define STATUS2_VIDRM_SHIFT (7)
#define STATUS2_CHGTYP_MASK (0x7 << STATUS2_CHGTYP_SHIFT)
#define STATUS2_CHGDETRUN_MASK (0x1 << STATUS2_CHGDETRUN_SHIFT)
#define STATUS2_DCDTMR_MASK (0x1 << STATUS2_DCDTMR_SHIFT)
#define STATUS2_DXOVP_MASK (0x1 << STATUS2_DXOVP_SHIFT)
#define STATUS2_VBVOLT_MASK (0x1 << STATUS2_VBVOLT_SHIFT)
#define STATUS2_VIDRM_MASK (0x1 << STATUS2_VIDRM_SHIFT)
#define STATUS3_OVP_SHIFT (2)
#define STATUS3_OVP_MASK (0x1 << STATUS3_OVP_SHIFT)
/* MAX77693 CDETCTRL1~2 register */
#define CDETCTRL1_CHGDETEN_SHIFT (0)
#define CDETCTRL1_CHGTYPMAN_SHIFT (1)
#define CDETCTRL1_DCDEN_SHIFT (2)
#define CDETCTRL1_DCD2SCT_SHIFT (3)
#define CDETCTRL1_CDDELAY_SHIFT (4)
#define CDETCTRL1_DCDCPL_SHIFT (5)
#define CDETCTRL1_CDPDET_SHIFT (7)
#define CDETCTRL1_CHGDETEN_MASK (0x1 << CDETCTRL1_CHGDETEN_SHIFT)
#define CDETCTRL1_CHGTYPMAN_MASK (0x1 << CDETCTRL1_CHGTYPMAN_SHIFT)
#define CDETCTRL1_DCDEN_MASK (0x1 << CDETCTRL1_DCDEN_SHIFT)
#define CDETCTRL1_DCD2SCT_MASK (0x1 << CDETCTRL1_DCD2SCT_SHIFT)
#define CDETCTRL1_CDDELAY_MASK (0x1 << CDETCTRL1_CDDELAY_SHIFT)
#define CDETCTRL1_DCDCPL_MASK (0x1 << CDETCTRL1_DCDCPL_SHIFT)
#define CDETCTRL1_CDPDET_MASK (0x1 << CDETCTRL1_CDPDET_SHIFT)
#define CDETCTRL2_VIDRMEN_SHIFT (1)
#define CDETCTRL2_DXOVPEN_SHIFT (3)
#define CDETCTRL2_VIDRMEN_MASK (0x1 << CDETCTRL2_VIDRMEN_SHIFT)
#define CDETCTRL2_DXOVPEN_MASK (0x1 << CDETCTRL2_DXOVPEN_SHIFT)
/* MAX77693 MUIC - CONTROL1~3 register */
#define COMN1SW_SHIFT (0)
#define COMP2SW_SHIFT (3)
#define COMN1SW_MASK (0x7 << COMN1SW_SHIFT)
#define COMP2SW_MASK (0x7 << COMP2SW_SHIFT)
#define COMP_SW_MASK (COMP2SW_MASK | COMN1SW_MASK)
#define CONTROL1_SW_USB ((1 << COMP2SW_SHIFT) \
| (1 << COMN1SW_SHIFT))
#define CONTROL1_SW_AUDIO ((2 << COMP2SW_SHIFT) \
| (2 << COMN1SW_SHIFT))
#define CONTROL1_SW_UART ((3 << COMP2SW_SHIFT) \
| (3 << COMN1SW_SHIFT))
#define CONTROL1_SW_OPEN ((0 << COMP2SW_SHIFT) \
| (0 << COMN1SW_SHIFT))
#define CONTROL2_LOWPWR_SHIFT (0)
#define CONTROL2_ADCEN_SHIFT (1)
#define CONTROL2_CPEN_SHIFT (2)
#define CONTROL2_SFOUTASRT_SHIFT (3)
#define CONTROL2_SFOUTORD_SHIFT (4)
#define CONTROL2_ACCDET_SHIFT (5)
#define CONTROL2_USBCPINT_SHIFT (6)
#define CONTROL2_RCPS_SHIFT (7)
#define CONTROL2_LOWPWR_MASK (0x1 << CONTROL2_LOWPWR_SHIFT)
#define CONTROL2_ADCEN_MASK (0x1 << CONTROL2_ADCEN_SHIFT)
#define CONTROL2_CPEN_MASK (0x1 << CONTROL2_CPEN_SHIFT)
#define CONTROL2_SFOUTASRT_MASK (0x1 << CONTROL2_SFOUTASRT_SHIFT)
#define CONTROL2_SFOUTORD_MASK (0x1 << CONTROL2_SFOUTORD_SHIFT)
#define CONTROL2_ACCDET_MASK (0x1 << CONTROL2_ACCDET_SHIFT)
#define CONTROL2_USBCPINT_MASK (0x1 << CONTROL2_USBCPINT_SHIFT)
#define CONTROL2_RCPS_MASK (0x1 << CONTROL2_RCPS_SHIFT)
#define CONTROL3_JIGSET_SHIFT (0)
#define CONTROL3_BTLDSET_SHIFT (2)
#define CONTROL3_ADCDBSET_SHIFT (4)
#define CONTROL3_JIGSET_MASK (0x3 << CONTROL3_JIGSET_SHIFT)
#define CONTROL3_BTLDSET_MASK (0x3 << CONTROL3_BTLDSET_SHIFT)
#define CONTROL3_ADCDBSET_MASK (0x3 << CONTROL3_ADCDBSET_SHIFT)
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_adc;
int prev_adc_gnd;
int prev_chg_type;
u8 status[2];
int irq;
struct work_struct irq_work;
struct mutex mutex;
};
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, ADCLow:0, ADC1K:0 */
MAX77693_MUIC_GND_AV_CABLE_LOAD = 0x102,/* ADC:0x0, ADCLow:1, ADC1K:0 */
MAX77693_MUIC_GND_MHL_CABLE = 0x103, /* ADC:0x0, ADCLow:1, ADC1K:1 */
};
/* MAX77693 MUIC device support below list of accessories(external connector) */
const char *max77693_extcon_cable[] = {
[0] = "USB",
[1] = "USB-Host",
[2] = "TA",
[3] = "Fast-charger",
[4] = "Slow-charger",
[5] = "Charge-downstream",
[6] = "MHL",
[7] = "Audio-video-load",
[8] = "Audio-video-noload",
[9] = "JIG",
NULL,
};
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;
};
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;
}
static int max77693_muic_adc_ground_handler(struct max77693_muic_info *info,
bool attached)
{
int ret = 0;
int type;
int adc, adc1k, adclow;
if (attached) {
adc = info->status[0] & STATUS1_ADC_MASK;
adclow = info->status[0] & STATUS1_ADCLOW_MASK;
adclow >>= STATUS1_ADCLOW_SHIFT;
adc1k = info->status[0] & STATUS1_ADC1K_MASK;
adc1k >>= STATUS1_ADC1K_SHIFT;
/**
* [0x1][ADCLow][ADC1K]
* [0x1 0 0 ] : USB_OTG
* [0x1 1 0 ] : Audio Video Cable with load
* [0x1 1 1 ] : MHL
*/
type = ((0x1 << 8) | (adclow << 1) | adc1k);
/* Store previous ADC value to handle accessory
when accessory will be detached */
info->prev_adc = adc;
info->prev_adc_gnd = type;
} else
type = info->prev_adc_gnd;
switch (type) {
case MAX77693_MUIC_GND_USB_OTG:
/* USB_OTG */
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 */
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_CABLE:
/* MHL */
extcon_set_cable_state(info->edev, "MHL", attached);
break;
default:
dev_err(info->dev, "failed to detect %s accessory\n",
attached ? "attached" : "detached");
dev_err(info->dev, "- adc:0x%x, adclow:0x%x, adc1k:0x%x\n",
adc, adclow, adc1k);
ret = -EINVAL;
break;
}
out:
return ret;
}
static int max77693_muic_adc_handler(struct max77693_muic_info *info,
int curr_adc, bool attached)
{
int ret = 0;
int adc;
if (attached) {
/* Store ADC value to handle accessory
when accessory will be detached */
info->prev_adc = curr_adc;
adc = curr_adc;
} else
adc = info->prev_adc;
dev_info(info->dev,
"external connector is %s (adc:0x%02x, prev_adc:0x%x)\n",
attached ? "attached" : "detached", curr_adc, info->prev_adc);
switch (adc) {
case MAX77693_MUIC_ADC_GROUND:
/* USB_OTG/MHL/Audio */
max77693_muic_adc_ground_handler(info, attached);
break;
case MAX77693_MUIC_ADC_FACTORY_MODE_USB_OFF:
case MAX77693_MUIC_ADC_FACTORY_MODE_USB_ON:
/* 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_MUIC_ADC_FACTORY_MODE_UART_OFF:
case MAX77693_MUIC_ADC_FACTORY_MODE_UART_ON:
/* 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_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", adc);
goto out;
default:
dev_err(info->dev,
"failed to detect %s accessory (adc:0x%x)\n",
attached ? "attached" : "detached", adc);
ret = -EINVAL;
goto out;
}
out:
return ret;
}
static int max77693_muic_chg_handler(struct max77693_muic_info *info,
int curr_chg_type, bool attached)
{
int ret = 0;
int chg_type;
if (attached) {
/* Store previous charger type to control
when charger accessory will be detached */
info->prev_chg_type = curr_chg_type;
chg_type = curr_chg_type;
} else
chg_type = info->prev_chg_type;
dev_info(info->dev,
"external connector is %s(chg_type:0x%x, prev_chg_type:0x%x)\n",
attached ? "attached" : "detached",
curr_chg_type, info->prev_chg_type);
switch (chg_type) {
case MAX77693_CHARGER_TYPE_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 curr_adc, curr_chg_type;
int irq_type = -1;
int i, ret = 0;
bool attached = true;
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 */
curr_adc = info->status[0] & STATUS1_ADC_MASK;
curr_adc >>= STATUS1_ADC_SHIFT;
/* Check accessory state which is either detached or attached */
if (curr_adc == MAX77693_MUIC_ADC_OPEN)
attached = false;
ret = max77693_muic_adc_handler(info, curr_adc, attached);
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 */
curr_chg_type = info->status[1] & STATUS2_CHGTYP_MASK;
curr_chg_type >>= STATUS2_CHGTYP_SHIFT;
/* Check charger accessory state which
is either detached or attached */
if (curr_chg_type == MAX77693_CHARGER_TYPE_NONE)
attached = false;
ret = max77693_muic_chg_handler(info, curr_chg_type, attached);
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, chg_type;
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 = info->status[0] & STATUS1_ADC_MASK;
adc >>= STATUS1_ADC_SHIFT;
if (adc != MAX77693_MUIC_ADC_OPEN) {
dev_info(info->dev,
"external connector is attached (adc:0x%02x)\n", adc);
ret = max77693_muic_adc_handler(info, adc, true);
if (ret < 0)
dev_err(info->dev, "failed to detect accessory\n");
goto out;
}
chg_type = info->status[1] & STATUS2_CHGTYP_MASK;
chg_type >>= STATUS2_CHGTYP_SHIFT;
if (chg_type != MAX77693_CHARGER_TYPE_NONE) {
dev_info(info->dev,
"external connector is attached (chg_type:0x%x)\n",
chg_type);
max77693_muic_chg_handler(info, chg_type, true);
if (ret < 0)
dev_err(info->dev, "failed to detect charger accessory\n");
}
out:
mutex_unlock(&info->mutex);
return ret;
}
static int __devinit max77693_muic_probe(struct platform_device *pdev)
{
struct max77693_dev *max77693 = dev_get_drvdata(pdev->dev.parent);
struct max77693_muic_info *info;
int ret, i;
u8 id;
info = kzalloc(sizeof(struct max77693_muic_info), GFP_KERNEL);
if (!info) {
dev_err(&pdev->dev, "failed to allocate memory\n");
ret = -ENOMEM;
goto err_kfree;
}
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);
goto err_regmap;
}
}
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 = 0;
virq = irq_create_mapping(max77693->irq_domain, muic_irq->irq);
if (!virq)
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);
for (i = i - 1; i >= 0; i--)
free_irq(muic_irq->virq, info);
goto err_irq;
}
}
/* Initialize extcon device */
info->edev = kzalloc(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_extcon;
}
/* 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_extcon;
}
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_extcon:
kfree(info->edev);
err_irq:
err_regmap:
kfree(info);
err_kfree:
return ret;
}
static int __devexit 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);
kfree(info);
return 0;
}
static struct platform_driver max77693_muic_driver = {
.driver = {
.name = DEV_NAME,
.owner = THIS_MODULE,
},
.probe = max77693_muic_probe,
.remove = __devexit_p(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");
