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extcon: max77843: Add support for SmartDock accessory 

SmartDock uses ADC_RESERVED_ACC_3 (0x10) ADC ID type and provides following
features:
1. USB host with embedded USB hub (2-4 ports) for mice, keyboard, etc,
2. MHL for video output,
3. charging.

Tested with Unitek Y-2165 MHL+OTG Hub Smart Phone Dock.

Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com>
Acked-by: Chanwoo Choi <cw00.choi@samsung.com>
Acked-by: Lee Jones <lee.jones@linaro.org>
Signed-off-by: Chanwoo Choi <cw00.choi@samsung.com>
This commit is contained in:
Marek Szyprowski 2017-10-18 11:56:22 +02:00 committed by Chanwoo Choi
parent 7b9651103b
commit 4a4a87146a
2 changed files with 65 additions and 14 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

77
drivers/extcon/extcon-max77843.c
View File

@ -80,7 +80,7 @@ enum max77843_muic_accessory_type {
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_3, /* SmartDock */
MAX77843_MUIC_ADC_RESERVED_ACC_4,
MAX77843_MUIC_ADC_RESERVED_ACC_5,
MAX77843_MUIC_ADC_AUDIO_DEVICE_TYPE2,
@ -119,6 +119,7 @@ enum max77843_muic_charger_type {
MAX77843_MUIC_CHG_SPECIAL_BIAS,
MAX77843_MUIC_CHG_RESERVED,
MAX77843_MUIC_CHG_GND,
MAX77843_MUIC_CHG_DOCK,
};
static const unsigned int max77843_extcon_cable[] = {
@ -130,6 +131,7 @@ static const unsigned int max77843_extcon_cable[] = {
EXTCON_CHG_USB_FAST,
EXTCON_CHG_USB_SLOW,
EXTCON_DISP_MHL,
EXTCON_DOCK,
EXTCON_JIG,
EXTCON_NONE,
};
@ -200,7 +202,7 @@ static const struct regmap_irq_chip max77843_muic_irq_chip = {
};
static int max77843_muic_set_path(struct max77843_muic_info *info,
u8 val, bool attached)
u8 val, bool attached, bool nobccomp)
{
struct max77693_dev *max77843 = info->max77843;
int ret = 0;
@ -210,10 +212,16 @@ static int max77843_muic_set_path(struct max77843_muic_info *info,
ctrl1 = val;
else
ctrl1 = MAX77843_MUIC_CONTROL1_SW_OPEN;
if (nobccomp) {
/* Disable BC1.2 protocol and force manual switch control */
ctrl1 |= MAX77843_MUIC_CONTROL1_NOBCCOMP_MASK;
}
ret = regmap_update_bits(max77843->regmap_muic,
MAX77843_MUIC_REG_CONTROL1,
MAX77843_MUIC_CONTROL1_COM_SW, ctrl1);
MAX77843_MUIC_CONTROL1_COM_SW |
MAX77843_MUIC_CONTROL1_NOBCCOMP_MASK,
ctrl1);
if (ret < 0) {
dev_err(info->dev, "Cannot switch MUIC port\n");
return ret;
@ -303,6 +311,19 @@ static int max77843_muic_get_cable_type(struct max77843_muic_info *info,
break;
}
if (adc == MAX77843_MUIC_ADC_RESERVED_ACC_3) { /* SmartDock */
if (chg_type == MAX77843_MUIC_CHG_NONE) {
*attached = false;
cable_type = info->prev_chg_type;
info->prev_chg_type = MAX77843_MUIC_CHG_NONE;
} else {
*attached = true;
cable_type = MAX77843_MUIC_CHG_DOCK;
info->prev_chg_type = MAX77843_MUIC_CHG_DOCK;
}
break;
}
if (chg_type == MAX77843_MUIC_CHG_NONE) {
*attached = false;
cable_type = info->prev_chg_type;
@ -365,7 +386,7 @@ static int max77843_muic_adc_gnd_handler(struct max77843_muic_info *info)
case MAX77843_MUIC_GND_USB_HOST_VB:
ret = max77843_muic_set_path(info,
MAX77843_MUIC_CONTROL1_SW_USB,
attached);
attached, false);
if (ret < 0)
return ret;
@ -376,7 +397,7 @@ static int max77843_muic_adc_gnd_handler(struct max77843_muic_info *info)
case MAX77843_MUIC_GND_MHL:
ret = max77843_muic_set_path(info,
MAX77843_MUIC_CONTROL1_SW_OPEN,
attached);
attached, false);
if (ret < 0)
return ret;
@ -412,7 +433,7 @@ static int max77843_muic_jig_handler(struct max77843_muic_info *info,
return -EINVAL;
}
ret = max77843_muic_set_path(info, path, attached);
ret = max77843_muic_set_path(info, path, attached, false);
if (ret < 0)
return ret;
@ -421,6 +442,26 @@ static int max77843_muic_jig_handler(struct max77843_muic_info *info,
return 0;
}
static int max77843_muic_dock_handler(struct max77843_muic_info *info,
bool attached)
{
int ret;
dev_dbg(info->dev, "external connector is %s (adc: 0x10)\n",
attached ? "attached" : "detached");
ret = max77843_muic_set_path(info, MAX77843_MUIC_CONTROL1_SW_USB,
attached, attached);
if (ret < 0)
return ret;
extcon_set_state_sync(info->edev, EXTCON_DISP_MHL, attached);
extcon_set_state_sync(info->edev, EXTCON_USB_HOST, attached);
extcon_set_state_sync(info->edev, EXTCON_DOCK, attached);
return 0;
}
static int max77843_muic_adc_handler(struct max77843_muic_info *info)
{
int ret, cable_type;
@ -435,6 +476,11 @@ static int max77843_muic_adc_handler(struct max77843_muic_info *info)
info->prev_cable_type);
switch (cable_type) {
case MAX77843_MUIC_ADC_RESERVED_ACC_3: /* SmartDock */
ret = max77843_muic_dock_handler(info, attached);
if (ret < 0)
return ret;
break;
case MAX77843_MUIC_ADC_GROUND:
ret = max77843_muic_adc_gnd_handler(info);
if (ret < 0)
@ -462,7 +508,6 @@ static int max77843_muic_adc_handler(struct max77843_muic_info *info)
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:
@ -506,7 +551,7 @@ static int max77843_muic_chg_handler(struct max77843_muic_info *info)
case MAX77843_MUIC_CHG_USB:
ret = max77843_muic_set_path(info,
MAX77843_MUIC_CONTROL1_SW_USB,
attached);
attached, false);
if (ret < 0)
return ret;
@ -517,7 +562,7 @@ static int max77843_muic_chg_handler(struct max77843_muic_info *info)
case MAX77843_MUIC_CHG_DOWNSTREAM:
ret = max77843_muic_set_path(info,
MAX77843_MUIC_CONTROL1_SW_OPEN,
attached);
attached, false);
if (ret < 0)
return ret;
@ -527,7 +572,7 @@ static int max77843_muic_chg_handler(struct max77843_muic_info *info)
case MAX77843_MUIC_CHG_DEDICATED:
ret = max77843_muic_set_path(info,
MAX77843_MUIC_CONTROL1_SW_OPEN,
attached);
attached, false);
if (ret < 0)
return ret;
@ -537,7 +582,7 @@ static int max77843_muic_chg_handler(struct max77843_muic_info *info)
case MAX77843_MUIC_CHG_SPECIAL_500MA:
ret = max77843_muic_set_path(info,
MAX77843_MUIC_CONTROL1_SW_OPEN,
attached);
attached, false);
if (ret < 0)
return ret;
@ -547,7 +592,7 @@ static int max77843_muic_chg_handler(struct max77843_muic_info *info)
case MAX77843_MUIC_CHG_SPECIAL_1A:
ret = max77843_muic_set_path(info,
MAX77843_MUIC_CONTROL1_SW_OPEN,
attached);
attached, false);
if (ret < 0)
return ret;
@ -566,6 +611,9 @@ static int max77843_muic_chg_handler(struct max77843_muic_info *info)
extcon_set_state_sync(info->edev, EXTCON_CHG_USB_DCP,
false);
break;
case MAX77843_MUIC_CHG_DOCK:
extcon_set_state_sync(info->edev, EXTCON_CHG_USB_DCP, attached);
break;
case MAX77843_MUIC_CHG_NONE:
break;
default:
@ -574,7 +622,7 @@ static int max77843_muic_chg_handler(struct max77843_muic_info *info)
attached ? "attached" : "detached", chg_type);
max77843_muic_set_path(info, MAX77843_MUIC_CONTROL1_SW_OPEN,
attached);
attached, false);
return -EINVAL;
}
@ -814,7 +862,8 @@ static int max77843_muic_probe(struct platform_device *pdev)
max77843_muic_set_debounce_time(info, MAX77843_DEBOUNCE_TIME_25MS);
/* Set initial path for UART */
max77843_muic_set_path(info, MAX77843_MUIC_CONTROL1_SW_UART, true);
max77843_muic_set_path(info, MAX77843_MUIC_CONTROL1_SW_UART, true,
false);
/* Check revision number of MUIC device */
ret = regmap_read(max77843->regmap_muic, MAX77843_MUIC_REG_ID, &id);

2
include/linux/mfd/max77843-private.h
View File

@ -350,6 +350,7 @@ enum max77843_irq_muic {
/* MAX77843 CONTROL register */
#define MAX77843_MUIC_CONTROL1_COMP1SW_SHIFT 0
#define MAX77843_MUIC_CONTROL1_COMP2SW_SHIFT 3
#define MAX77843_MUIC_CONTROL1_NOBCCOMP_SHIFT 6
#define MAX77843_MUIC_CONTROL1_IDBEN_SHIFT 7
#define MAX77843_MUIC_CONTROL2_LOWPWR_SHIFT 0
#define MAX77843_MUIC_CONTROL2_ADCEN_SHIFT 1
@ -366,6 +367,7 @@ enum max77843_irq_muic {
#define MAX77843_MUIC_CONTROL1_COMP1SW_MASK (0x7 << MAX77843_MUIC_CONTROL1_COMP1SW_SHIFT)
#define MAX77843_MUIC_CONTROL1_COMP2SW_MASK (0x7 << MAX77843_MUIC_CONTROL1_COMP2SW_SHIFT)
#define MAX77843_MUIC_CONTROL1_IDBEN_MASK BIT(MAX77843_MUIC_CONTROL1_IDBEN_SHIFT)
#define MAX77843_MUIC_CONTROL1_NOBCCOMP_MASK BIT(MAX77843_MUIC_CONTROL1_NOBCCOMP_SHIFT)
#define MAX77843_MUIC_CONTROL2_LOWPWR_MASK BIT(MAX77843_MUIC_CONTROL2_LOWPWR_SHIFT)
#define MAX77843_MUIC_CONTROL2_ADCEN_MASK BIT(MAX77843_MUIC_CONTROL2_ADCEN_SHIFT)
#define MAX77843_MUIC_CONTROL2_CPEN_MASK BIT(MAX77843_MUIC_CONTROL2_CPEN_SHIFT)