linux/drivers/extcon/extcon-max77843.c
Chanwoo Choi 73b6ecdb93 extcon: Redefine the unique id of supported external connectors without 'enum extcon' type
This patch just redefine the unique id of supported external connectors without
'enum extcon' type. Because unique id would be used on devictree file(*.dts) to
indicate the specific external connectors like key number of input framework.
So, I have the plan to move this definitions to following header file which
includes the unique id of supported external connectors.
- include/dt-bindings/extcon/extcon.h

Fixes: 2a9de9c0f0 ("extcon: Use the unique id for external connector instead of string")
Signed-off-by: Chanwoo Choi <cw00.choi@samsung.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2015-06-12 17:01:42 -07:00

857 lines
23 KiB
C

/*
* 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>
*
* 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.
*/
#include <linux/extcon.h>
#include <linux/i2c.h>
#include <linux/interrupt.h>
#include <linux/kernel.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 max77843 *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,
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 blow 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,
};
static const unsigned int max77843_extcon_cable[] = {
EXTCON_USB,
EXTCON_USB_HOST,
EXTCON_TA,
EXTCON_CHARGE_DOWNSTREAM,
EXTCON_FAST_CHARGER,
EXTCON_SLOW_CHARGER,
EXTCON_MHL,
EXTCON_JIG,
EXTCON_NONE,
};
struct max77843_muic_irq {
unsigned int irq;
const char *name;
unsigned int virq;
};
static struct max77843_muic_irq max77843_muic_irqs[] = {
{ MAX77843_MUIC_IRQ_INT1_ADC, "MUIC-ADC" },
{ MAX77843_MUIC_IRQ_INT1_ADCERROR, "MUIC-ADC_ERROR" },
{ MAX77843_MUIC_IRQ_INT1_ADC1K, "MUIC-ADC1K" },
{ MAX77843_MUIC_IRQ_INT2_CHGTYP, "MUIC-CHGTYP" },
{ MAX77843_MUIC_IRQ_INT2_CHGDETRUN, "MUIC-CHGDETRUN" },
{ MAX77843_MUIC_IRQ_INT2_DCDTMR, "MUIC-DCDTMR" },
{ MAX77843_MUIC_IRQ_INT2_DXOVP, "MUIC-DXOVP" },
{ MAX77843_MUIC_IRQ_INT2_VBVOLT, "MUIC-VBVOLT" },
{ MAX77843_MUIC_IRQ_INT3_VBADC, "MUIC-VBADC" },
{ MAX77843_MUIC_IRQ_INT3_VDNMON, "MUIC-VDNMON" },
{ MAX77843_MUIC_IRQ_INT3_DNRES, "MUIC-DNRES" },
{ MAX77843_MUIC_IRQ_INT3_MPNACK, "MUIC-MPNACK"},
{ MAX77843_MUIC_IRQ_INT3_MRXBUFOW, "MUIC-MRXBUFOW"},
{ MAX77843_MUIC_IRQ_INT3_MRXTRF, "MUIC-MRXTRF"},
{ MAX77843_MUIC_IRQ_INT3_MRXPERR, "MUIC-MRXPERR"},
{ MAX77843_MUIC_IRQ_INT3_MRXRDY, "MUIC-MRXRDY"},
};
static const struct regmap_config max77843_muic_regmap_config = {
.reg_bits = 8,
.val_bits = 8,
.max_register = MAX77843_MUIC_REG_END,
};
static const struct regmap_irq max77843_muic_irq[] = {
/* INT1 interrupt */
{ .reg_offset = 0, .mask = MAX77843_MUIC_ADC, },
{ .reg_offset = 0, .mask = MAX77843_MUIC_ADCERROR, },
{ .reg_offset = 0, .mask = MAX77843_MUIC_ADC1K, },
/* INT2 interrupt */
{ .reg_offset = 1, .mask = MAX77843_MUIC_CHGTYP, },
{ .reg_offset = 1, .mask = MAX77843_MUIC_CHGDETRUN, },
{ .reg_offset = 1, .mask = MAX77843_MUIC_DCDTMR, },
{ .reg_offset = 1, .mask = MAX77843_MUIC_DXOVP, },
{ .reg_offset = 1, .mask = MAX77843_MUIC_VBVOLT, },
/* INT3 interrupt */
{ .reg_offset = 2, .mask = MAX77843_MUIC_VBADC, },
{ .reg_offset = 2, .mask = MAX77843_MUIC_VDNMON, },
{ .reg_offset = 2, .mask = MAX77843_MUIC_DNRES, },
{ .reg_offset = 2, .mask = MAX77843_MUIC_MPNACK, },
{ .reg_offset = 2, .mask = MAX77843_MUIC_MRXBUFOW, },
{ .reg_offset = 2, .mask = MAX77843_MUIC_MRXTRF, },
{ .reg_offset = 2, .mask = MAX77843_MUIC_MRXPERR, },
{ .reg_offset = 2, .mask = MAX77843_MUIC_MRXRDY, },
};
static const struct regmap_irq_chip max77843_muic_irq_chip = {
.name = "max77843-muic",
.status_base = MAX77843_MUIC_REG_INT1,
.mask_base = MAX77843_MUIC_REG_INTMASK1,
.mask_invert = true,
.num_regs = 3,
.irqs = max77843_muic_irq,
.num_irqs = ARRAY_SIZE(max77843_muic_irq),
};
static int max77843_muic_set_path(struct max77843_muic_info *info,
u8 val, bool attached)
{
struct max77843 *max77843 = info->max77843;
int ret = 0;
unsigned int ctrl1, ctrl2;
if (attached)
ctrl1 = val;
else
ctrl1 = CONTROL1_SW_OPEN;
ret = regmap_update_bits(max77843->regmap_muic,
MAX77843_MUIC_REG_CONTROL1,
CONTROL1_COM_SW, 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 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 >>= 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 (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 >>= 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, CONTROL1_SW_USB, attached);
if (ret < 0)
return ret;
extcon_set_cable_state_(info->edev, EXTCON_USB_HOST, attached);
break;
case MAX77843_MUIC_GND_MHL_VB:
case MAX77843_MUIC_GND_MHL:
ret = max77843_muic_set_path(info, CONTROL1_SW_OPEN, attached);
if (ret < 0)
return ret;
extcon_set_cable_state_(info->edev, EXTCON_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 = 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 = CONTROL1_SW_USB;
break;
case MAX77843_MUIC_ADC_FACTORY_MODE_UART_OFF:
path = CONTROL1_SW_UART;
break;
default:
return -EINVAL;
}
ret = max77843_muic_set_path(info, path, attached);
if (ret < 0)
return ret;
extcon_set_cable_state_(info->edev, EXTCON_JIG, 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_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_3:
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, CONTROL1_SW_USB, attached);
if (ret < 0)
return ret;
extcon_set_cable_state_(info->edev, EXTCON_USB, attached);
break;
case MAX77843_MUIC_CHG_DOWNSTREAM:
ret = max77843_muic_set_path(info, CONTROL1_SW_OPEN, attached);
if (ret < 0)
return ret;
extcon_set_cable_state_(info->edev, EXTCON_CHARGE_DOWNSTREAM,
attached);
break;
case MAX77843_MUIC_CHG_DEDICATED:
ret = max77843_muic_set_path(info, CONTROL1_SW_OPEN, attached);
if (ret < 0)
return ret;
extcon_set_cable_state_(info->edev, EXTCON_TA, attached);
break;
case MAX77843_MUIC_CHG_SPECIAL_500MA:
ret = max77843_muic_set_path(info, CONTROL1_SW_OPEN, attached);
if (ret < 0)
return ret;
extcon_set_cable_state_(info->edev, EXTCON_SLOW_CHARGER,
attached);
break;
case MAX77843_MUIC_CHG_SPECIAL_1A:
ret = max77843_muic_set_path(info, CONTROL1_SW_OPEN, attached);
if (ret < 0)
return ret;
extcon_set_cable_state_(info->edev, EXTCON_FAST_CHARGER,
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_cable_state_(info->edev, EXTCON_TA, true);
else if (gnd_type == MAX77843_MUIC_GND_MHL)
extcon_set_cable_state_(info->edev, EXTCON_TA, false);
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, CONTROL1_SW_OPEN, attached);
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 max77843 *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 max77843 *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 max77843 *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 << 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 max77843 *max77843)
{
int ret;
max77843->i2c_muic = i2c_new_dummy(max77843->i2c->adapter,
I2C_ADDR_MUIC);
if (!max77843->i2c_muic) {
dev_err(&max77843->i2c->dev,
"Cannot allocate I2C device for MUIC\n");
return -ENOMEM;
}
i2c_set_clientdata(max77843->i2c_muic, max77843);
max77843->regmap_muic = devm_regmap_init_i2c(max77843->i2c_muic,
&max77843_muic_regmap_config);
if (IS_ERR(max77843->regmap_muic)) {
ret = PTR_ERR(max77843->regmap_muic);
goto err_muic_i2c;
}
ret = regmap_add_irq_chip(max77843->regmap_muic, max77843->irq,
IRQF_TRIGGER_LOW | IRQF_ONESHOT | IRQF_SHARED,
0, &max77843_muic_irq_chip, &max77843->irq_data_muic);
if (ret < 0) {
dev_err(&max77843->i2c->dev, "Cannot add MUIC IRQ chip\n");
goto err_muic_i2c;
}
return 0;
err_muic_i2c:
i2c_unregister_device(max77843->i2c_muic);
return ret;
}
static int max77843_muic_probe(struct platform_device *pdev)
{
struct max77843 *max77843 = dev_get_drvdata(pdev->dev.parent);
struct max77843_muic_info *info;
unsigned int id;
int i, ret;
info = devm_kzalloc(&pdev->dev, sizeof(*info), GFP_KERNEL);
if (!info)
return -ENOMEM;
info->dev = &pdev->dev;
info->max77843 = max77843;
platform_set_drvdata(pdev, info);
mutex_init(&info->mutex);
/* Initialize i2c and regmap */
ret = max77843_init_muic_regmap(max77843);
if (ret) {
dev_err(&pdev->dev, "Failed to init MUIC regmap\n");
return ret;
}
/* Turn off auto detection configuration */
ret = regmap_update_bits(max77843->regmap_muic,
MAX77843_MUIC_REG_CONTROL4,
MAX77843_MUIC_CONTROL4_USBAUTO_MASK |
MAX77843_MUIC_CONTROL4_FCTAUTO_MASK,
CONTROL4_AUTO_DISABLE);
/* Initialize extcon device */
info->edev = devm_extcon_dev_allocate(&pdev->dev,
max77843_extcon_cable);
if (IS_ERR(info->edev)) {
dev_err(&pdev->dev, "Failed to allocate memory for extcon\n");
ret = -ENODEV;
goto err_muic_irq;
}
ret = devm_extcon_dev_register(&pdev->dev, info->edev);
if (ret) {
dev_err(&pdev->dev, "Failed to register extcon device\n");
goto err_muic_irq;
}
/* Set ADC debounce time */
max77843_muic_set_debounce_time(info, MAX77843_DEBOUNCE_TIME_25MS);
/* Set initial path for UART */
max77843_muic_set_path(info, CONTROL1_SW_UART, true);
/* 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);
for (i = 0; i < ARRAY_SIZE(max77843_muic_irqs); i++) {
struct max77843_muic_irq *muic_irq = &max77843_muic_irqs[i];
unsigned int virq = 0;
virq = regmap_irq_get_virq(max77843->irq_data_muic,
muic_irq->irq);
if (virq <= 0) {
ret = -EINVAL;
goto err_muic_irq;
}
muic_irq->virq = virq;
ret = devm_request_threaded_irq(&pdev->dev, virq, NULL,
max77843_muic_irq_handler, IRQF_NO_SUSPEND,
muic_irq->name, info);
if (ret) {
dev_err(&pdev->dev,
"Failed to request irq (IRQ: %d, error: %d)\n",
muic_irq->irq, ret);
goto err_muic_irq;
}
}
/* Detect accessory after completing the initialization of platform */
INIT_DELAYED_WORK(&info->wq_detcable, max77843_muic_detect_cable_wq);
queue_delayed_work(system_power_efficient_wq,
&info->wq_detcable, msecs_to_jiffies(DELAY_MS_DEFAULT));
return 0;
err_muic_irq:
regmap_del_irq_chip(max77843->irq, max77843->irq_data_muic);
i2c_unregister_device(max77843->i2c_muic);
return ret;
}
static int max77843_muic_remove(struct platform_device *pdev)
{
struct max77843_muic_info *info = platform_get_drvdata(pdev);
struct max77843 *max77843 = info->max77843;
cancel_work_sync(&info->irq_work);
regmap_del_irq_chip(max77843->irq, max77843->irq_data_muic);
i2c_unregister_device(max77843->i2c_muic);
return 0;
}
static const struct platform_device_id max77843_muic_id[] = {
{ "max77843-muic", },
{ /* sentinel */ },
};
MODULE_DEVICE_TABLE(platform, max77843_muic_id);
static struct platform_driver max77843_muic_driver = {
.driver = {
.name = "max77843-muic",
},
.probe = max77843_muic_probe,
.remove = max77843_muic_remove,
.id_table = max77843_muic_id,
};
static int __init max77843_muic_init(void)
{
return platform_driver_register(&max77843_muic_driver);
}
subsys_initcall(max77843_muic_init);
MODULE_DESCRIPTION("Maxim MAX77843 Extcon driver");
MODULE_AUTHOR("Jaewon Kim <jaewon02.kim@samsung.com>");
MODULE_LICENSE("GPL");