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linux-zen-desktop/drivers/extcon/extcon-sm5502.c

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Initial commit
2023-08-30 17:31:07 +02:00
// SPDX-License-Identifier: GPL-2.0-or-later
/*
* extcon-sm5502.c - Silicon Mitus SM5502 extcon drvier to support USB switches
*
* Copyright (c) 2014 Samsung Electronics Co., Ltd
* Author: Chanwoo Choi <cw00.choi@samsung.com>
*/
#include <linux/err.h>
#include <linux/i2c.h>
#include <linux/interrupt.h>
#include <linux/irqdomain.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/platform_device.h>
#include <linux/regmap.h>
#include <linux/slab.h>
#include <linux/extcon-provider.h>
#include "extcon-sm5502.h"
#define DELAY_MS_DEFAULT 17000 /* unit: millisecond */
struct muic_irq {
unsigned int irq;
const char *name;
unsigned int virq;
};
struct reg_data {
u8 reg;
unsigned int val;
bool invert;
};
struct sm5502_muic_info {
struct device *dev;
struct extcon_dev *edev;
struct i2c_client *i2c;
struct regmap *regmap;
const struct sm5502_type *type;
struct regmap_irq_chip_data *irq_data;
int irq;
bool irq_attach;
bool irq_detach;
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;
};
struct sm5502_type {
struct muic_irq *muic_irqs;
unsigned int num_muic_irqs;
const struct regmap_irq_chip *irq_chip;
struct reg_data *reg_data;
unsigned int num_reg_data;
unsigned int otg_dev_type1;
int (*parse_irq)(struct sm5502_muic_info *info, int irq_type);
};
/* Default value of SM5502 register to bring up MUIC device. */
static struct reg_data sm5502_reg_data[] = {
{
.reg = SM5502_REG_RESET,
.val = SM5502_REG_RESET_MASK,
.invert = true,
}, {
.reg = SM5502_REG_CONTROL,
.val = SM5502_REG_CONTROL_MASK_INT_MASK,
.invert = false,
}, {
.reg = SM5502_REG_INTMASK1,
.val = SM5502_REG_INTM1_KP_MASK
| SM5502_REG_INTM1_LKP_MASK
| SM5502_REG_INTM1_LKR_MASK,
.invert = true,
}, {
.reg = SM5502_REG_INTMASK2,
.val = SM5502_REG_INTM2_VBUS_DET_MASK
| SM5502_REG_INTM2_REV_ACCE_MASK
| SM5502_REG_INTM2_ADC_CHG_MASK
| SM5502_REG_INTM2_STUCK_KEY_MASK
| SM5502_REG_INTM2_STUCK_KEY_RCV_MASK
| SM5502_REG_INTM2_MHL_MASK,
.invert = true,
},
};
/* Default value of SM5504 register to bring up MUIC device. */
static struct reg_data sm5504_reg_data[] = {
{
.reg = SM5502_REG_RESET,
.val = SM5502_REG_RESET_MASK,
.invert = true,
}, {
.reg = SM5502_REG_INTMASK1,
.val = SM5504_REG_INTM1_ATTACH_MASK
| SM5504_REG_INTM1_DETACH_MASK,
.invert = false,
}, {
.reg = SM5502_REG_INTMASK2,
.val = SM5504_REG_INTM2_RID_CHG_MASK
| SM5504_REG_INTM2_UVLO_MASK
| SM5504_REG_INTM2_POR_MASK,
.invert = true,
}, {
.reg = SM5502_REG_CONTROL,
.val = SM5502_REG_CONTROL_MANUAL_SW_MASK
| SM5504_REG_CONTROL_CHGTYP_MASK
| SM5504_REG_CONTROL_USBCHDEN_MASK
| SM5504_REG_CONTROL_ADC_EN_MASK,
.invert = true,
},
};
/* List of detectable cables */
static const unsigned int sm5502_extcon_cable[] = {
EXTCON_USB,
EXTCON_USB_HOST,
EXTCON_CHG_USB_SDP,
EXTCON_CHG_USB_DCP,
EXTCON_NONE,
};
/* Define supported accessory type */
enum sm5502_muic_acc_type {
SM5502_MUIC_ADC_GROUND = 0x0,
SM5502_MUIC_ADC_SEND_END_BUTTON,
SM5502_MUIC_ADC_REMOTE_S1_BUTTON,
SM5502_MUIC_ADC_REMOTE_S2_BUTTON,
SM5502_MUIC_ADC_REMOTE_S3_BUTTON,
SM5502_MUIC_ADC_REMOTE_S4_BUTTON,
SM5502_MUIC_ADC_REMOTE_S5_BUTTON,
SM5502_MUIC_ADC_REMOTE_S6_BUTTON,
SM5502_MUIC_ADC_REMOTE_S7_BUTTON,
SM5502_MUIC_ADC_REMOTE_S8_BUTTON,
SM5502_MUIC_ADC_REMOTE_S9_BUTTON,
SM5502_MUIC_ADC_REMOTE_S10_BUTTON,
SM5502_MUIC_ADC_REMOTE_S11_BUTTON,
SM5502_MUIC_ADC_REMOTE_S12_BUTTON,
SM5502_MUIC_ADC_RESERVED_ACC_1,
SM5502_MUIC_ADC_RESERVED_ACC_2,
SM5502_MUIC_ADC_RESERVED_ACC_3,
SM5502_MUIC_ADC_RESERVED_ACC_4,
SM5502_MUIC_ADC_RESERVED_ACC_5,
SM5502_MUIC_ADC_AUDIO_TYPE2,
SM5502_MUIC_ADC_PHONE_POWERED_DEV,
SM5502_MUIC_ADC_TTY_CONVERTER,
SM5502_MUIC_ADC_UART_CABLE,
SM5502_MUIC_ADC_TYPE1_CHARGER,
SM5502_MUIC_ADC_FACTORY_MODE_BOOT_OFF_USB,
SM5502_MUIC_ADC_FACTORY_MODE_BOOT_ON_USB,
SM5502_MUIC_ADC_AUDIO_VIDEO_CABLE,
SM5502_MUIC_ADC_TYPE2_CHARGER,
SM5502_MUIC_ADC_FACTORY_MODE_BOOT_OFF_UART,
SM5502_MUIC_ADC_FACTORY_MODE_BOOT_ON_UART,
SM5502_MUIC_ADC_AUDIO_TYPE1,
SM5502_MUIC_ADC_OPEN = 0x1f,
/*
* The below accessories have same ADC value (0x1f or 0x1e).
* So, Device type1 is used to separate specific accessory.
*/
/* |---------|--ADC| */
/* | [7:5]|[4:0]| */
SM5502_MUIC_ADC_AUDIO_TYPE1_FULL_REMOTE = 0x3e, /* | 001|11110| */
SM5502_MUIC_ADC_AUDIO_TYPE1_SEND_END = 0x5e, /* | 010|11110| */
/* |Dev Type1|--ADC| */
SM5502_MUIC_ADC_GROUND_USB_OTG = 0x80, /* | 100|00000| */
SM5502_MUIC_ADC_OPEN_USB = 0x5f, /* | 010|11111| */
SM5502_MUIC_ADC_OPEN_TA = 0xdf, /* | 110|11111| */
SM5502_MUIC_ADC_OPEN_USB_OTG = 0xff, /* | 111|11111| */
};
/* List of supported interrupt for SM5502 */
static struct muic_irq sm5502_muic_irqs[] = {
{ SM5502_IRQ_INT1_ATTACH, "muic-attach" },
{ SM5502_IRQ_INT1_DETACH, "muic-detach" },
{ SM5502_IRQ_INT1_KP, "muic-kp" },
{ SM5502_IRQ_INT1_LKP, "muic-lkp" },
{ SM5502_IRQ_INT1_LKR, "muic-lkr" },
{ SM5502_IRQ_INT1_OVP_EVENT, "muic-ovp-event" },
{ SM5502_IRQ_INT1_OCP_EVENT, "muic-ocp-event" },
{ SM5502_IRQ_INT1_OVP_OCP_DIS, "muic-ovp-ocp-dis" },
{ SM5502_IRQ_INT2_VBUS_DET, "muic-vbus-det" },
{ SM5502_IRQ_INT2_REV_ACCE, "muic-rev-acce" },
{ SM5502_IRQ_INT2_ADC_CHG, "muic-adc-chg" },
{ SM5502_IRQ_INT2_STUCK_KEY, "muic-stuck-key" },
{ SM5502_IRQ_INT2_STUCK_KEY_RCV, "muic-stuck-key-rcv" },
{ SM5502_IRQ_INT2_MHL, "muic-mhl" },
};
/* Define interrupt list of SM5502 to register regmap_irq */
static const struct regmap_irq sm5502_irqs[] = {
/* INT1 interrupts */
{ .reg_offset = 0, .mask = SM5502_IRQ_INT1_ATTACH_MASK, },
{ .reg_offset = 0, .mask = SM5502_IRQ_INT1_DETACH_MASK, },
{ .reg_offset = 0, .mask = SM5502_IRQ_INT1_KP_MASK, },
{ .reg_offset = 0, .mask = SM5502_IRQ_INT1_LKP_MASK, },
{ .reg_offset = 0, .mask = SM5502_IRQ_INT1_LKR_MASK, },
{ .reg_offset = 0, .mask = SM5502_IRQ_INT1_OVP_EVENT_MASK, },
{ .reg_offset = 0, .mask = SM5502_IRQ_INT1_OCP_EVENT_MASK, },
{ .reg_offset = 0, .mask = SM5502_IRQ_INT1_OVP_OCP_DIS_MASK, },
/* INT2 interrupts */
{ .reg_offset = 1, .mask = SM5502_IRQ_INT2_VBUS_DET_MASK,},
{ .reg_offset = 1, .mask = SM5502_IRQ_INT2_REV_ACCE_MASK, },
{ .reg_offset = 1, .mask = SM5502_IRQ_INT2_ADC_CHG_MASK, },
{ .reg_offset = 1, .mask = SM5502_IRQ_INT2_STUCK_KEY_MASK, },
{ .reg_offset = 1, .mask = SM5502_IRQ_INT2_STUCK_KEY_RCV_MASK, },
{ .reg_offset = 1, .mask = SM5502_IRQ_INT2_MHL_MASK, },
};
static const struct regmap_irq_chip sm5502_muic_irq_chip = {
.name = "sm5502",
.status_base = SM5502_REG_INT1,
.mask_base = SM5502_REG_INTMASK1,
.num_regs = 2,
.irqs = sm5502_irqs,
.num_irqs = ARRAY_SIZE(sm5502_irqs),
};
/* List of supported interrupt for SM5504 */
static struct muic_irq sm5504_muic_irqs[] = {
{ SM5504_IRQ_INT1_ATTACH, "muic-attach" },
{ SM5504_IRQ_INT1_DETACH, "muic-detach" },
{ SM5504_IRQ_INT1_CHG_DET, "muic-chg-det" },
{ SM5504_IRQ_INT1_DCD_OUT, "muic-dcd-out" },
{ SM5504_IRQ_INT1_OVP_EVENT, "muic-ovp-event" },
{ SM5504_IRQ_INT1_CONNECT, "muic-connect" },
{ SM5504_IRQ_INT1_ADC_CHG, "muic-adc-chg" },
{ SM5504_IRQ_INT2_RID_CHG, "muic-rid-chg" },
{ SM5504_IRQ_INT2_UVLO, "muic-uvlo" },
{ SM5504_IRQ_INT2_POR, "muic-por" },
{ SM5504_IRQ_INT2_OVP_FET, "muic-ovp-fet" },
{ SM5504_IRQ_INT2_OCP_LATCH, "muic-ocp-latch" },
{ SM5504_IRQ_INT2_OCP_EVENT, "muic-ocp-event" },
{ SM5504_IRQ_INT2_OVP_OCP_EVENT, "muic-ovp-ocp-event" },
};
/* Define interrupt list of SM5504 to register regmap_irq */
static const struct regmap_irq sm5504_irqs[] = {
/* INT1 interrupts */
{ .reg_offset = 0, .mask = SM5504_IRQ_INT1_ATTACH_MASK, },
{ .reg_offset = 0, .mask = SM5504_IRQ_INT1_DETACH_MASK, },
{ .reg_offset = 0, .mask = SM5504_IRQ_INT1_CHG_DET_MASK, },
{ .reg_offset = 0, .mask = SM5504_IRQ_INT1_DCD_OUT_MASK, },
{ .reg_offset = 0, .mask = SM5504_IRQ_INT1_OVP_MASK, },
{ .reg_offset = 0, .mask = SM5504_IRQ_INT1_CONNECT_MASK, },
{ .reg_offset = 0, .mask = SM5504_IRQ_INT1_ADC_CHG_MASK, },
/* INT2 interrupts */
{ .reg_offset = 1, .mask = SM5504_IRQ_INT2_RID_CHG_MASK,},
{ .reg_offset = 1, .mask = SM5504_IRQ_INT2_UVLO_MASK, },
{ .reg_offset = 1, .mask = SM5504_IRQ_INT2_POR_MASK, },
{ .reg_offset = 1, .mask = SM5504_IRQ_INT2_OVP_FET_MASK, },
{ .reg_offset = 1, .mask = SM5504_IRQ_INT2_OCP_LATCH_MASK, },
{ .reg_offset = 1, .mask = SM5504_IRQ_INT2_OCP_EVENT_MASK, },
{ .reg_offset = 1, .mask = SM5504_IRQ_INT2_OVP_OCP_EVENT_MASK, },
};
static const struct regmap_irq_chip sm5504_muic_irq_chip = {
.name = "sm5504",
.status_base = SM5502_REG_INT1,
.mask_base = SM5502_REG_INTMASK1,
.num_regs = 2,
.irqs = sm5504_irqs,
.num_irqs = ARRAY_SIZE(sm5504_irqs),
};
/* Define regmap configuration of SM5502 for I2C communication */
static bool sm5502_muic_volatile_reg(struct device *dev, unsigned int reg)
{
switch (reg) {
case SM5502_REG_INTMASK1:
case SM5502_REG_INTMASK2:
return true;
default:
break;
}
return false;
}
static const struct regmap_config sm5502_muic_regmap_config = {
.reg_bits = 8,
.val_bits = 8,
.volatile_reg = sm5502_muic_volatile_reg,
.max_register = SM5502_REG_END,
};
/* Change DM_CON/DP_CON/VBUSIN switch according to cable type */
static int sm5502_muic_set_path(struct sm5502_muic_info *info,
unsigned int con_sw, unsigned int vbus_sw,
bool attached)
{
int ret;
if (!attached) {
con_sw = DM_DP_SWITCH_OPEN;
vbus_sw = VBUSIN_SWITCH_OPEN;
}
switch (con_sw) {
case DM_DP_SWITCH_OPEN:
case DM_DP_SWITCH_USB:
case DM_DP_SWITCH_AUDIO:
case DM_DP_SWITCH_UART:
ret = regmap_update_bits(info->regmap, SM5502_REG_MANUAL_SW1,
SM5502_REG_MANUAL_SW1_DP_MASK |
SM5502_REG_MANUAL_SW1_DM_MASK,
con_sw);
if (ret < 0) {
dev_err(info->dev,
"cannot update DM_CON/DP_CON switch\n");
return ret;
}
break;
default:
dev_err(info->dev, "Unknown DM_CON/DP_CON switch type (%d)\n",
con_sw);
return -EINVAL;
}
switch (vbus_sw) {
case VBUSIN_SWITCH_OPEN:
case VBUSIN_SWITCH_VBUSOUT:
case VBUSIN_SWITCH_MIC:
case VBUSIN_SWITCH_VBUSOUT_WITH_USB:
ret = regmap_update_bits(info->regmap, SM5502_REG_MANUAL_SW1,
SM5502_REG_MANUAL_SW1_VBUSIN_MASK,
vbus_sw);
if (ret < 0) {
dev_err(info->dev,
"cannot update VBUSIN switch\n");
return ret;
}
break;
default:
dev_err(info->dev, "Unknown VBUS switch type (%d)\n", vbus_sw);
return -EINVAL;
}
return 0;
}
/* Return cable type of attached or detached accessories */
static unsigned int sm5502_muic_get_cable_type(struct sm5502_muic_info *info)
{
unsigned int cable_type, adc, dev_type1;
int ret;
/* Read ADC value according to external cable or button */
ret = regmap_read(info->regmap, SM5502_REG_ADC, &adc);
if (ret) {
dev_err(info->dev, "failed to read ADC register\n");
return ret;
}
/*
* If ADC is SM5502_MUIC_ADC_GROUND(0x0), external cable hasn't
* connected with to MUIC device.
*/
cable_type = adc & SM5502_REG_ADC_MASK;
switch (cable_type) {
case SM5502_MUIC_ADC_GROUND:
ret = regmap_read(info->regmap, SM5502_REG_DEV_TYPE1,
&dev_type1);
if (ret) {
dev_err(info->dev, "failed to read DEV_TYPE1 reg\n");
return ret;
}
if (dev_type1 == info->type->otg_dev_type1) {
cable_type = SM5502_MUIC_ADC_GROUND_USB_OTG;
} else {
dev_dbg(info->dev,
"cannot identify the cable type: adc(0x%x), dev_type1(0x%x)\n",
adc, dev_type1);
return -EINVAL;
}
break;
case SM5502_MUIC_ADC_SEND_END_BUTTON:
case SM5502_MUIC_ADC_REMOTE_S1_BUTTON:
case SM5502_MUIC_ADC_REMOTE_S2_BUTTON:
case SM5502_MUIC_ADC_REMOTE_S3_BUTTON:
case SM5502_MUIC_ADC_REMOTE_S4_BUTTON:
case SM5502_MUIC_ADC_REMOTE_S5_BUTTON:
case SM5502_MUIC_ADC_REMOTE_S6_BUTTON:
case SM5502_MUIC_ADC_REMOTE_S7_BUTTON:
case SM5502_MUIC_ADC_REMOTE_S8_BUTTON:
case SM5502_MUIC_ADC_REMOTE_S9_BUTTON:
case SM5502_MUIC_ADC_REMOTE_S10_BUTTON:
case SM5502_MUIC_ADC_REMOTE_S11_BUTTON:
case SM5502_MUIC_ADC_REMOTE_S12_BUTTON:
case SM5502_MUIC_ADC_RESERVED_ACC_1:
case SM5502_MUIC_ADC_RESERVED_ACC_2:
case SM5502_MUIC_ADC_RESERVED_ACC_3:
case SM5502_MUIC_ADC_RESERVED_ACC_4:
case SM5502_MUIC_ADC_RESERVED_ACC_5:
case SM5502_MUIC_ADC_AUDIO_TYPE2:
case SM5502_MUIC_ADC_PHONE_POWERED_DEV:
case SM5502_MUIC_ADC_TTY_CONVERTER:
case SM5502_MUIC_ADC_UART_CABLE:
case SM5502_MUIC_ADC_TYPE1_CHARGER:
case SM5502_MUIC_ADC_FACTORY_MODE_BOOT_OFF_USB:
case SM5502_MUIC_ADC_FACTORY_MODE_BOOT_ON_USB:
case SM5502_MUIC_ADC_AUDIO_VIDEO_CABLE:
case SM5502_MUIC_ADC_TYPE2_CHARGER:
case SM5502_MUIC_ADC_FACTORY_MODE_BOOT_OFF_UART:
case SM5502_MUIC_ADC_FACTORY_MODE_BOOT_ON_UART:
break;
case SM5502_MUIC_ADC_AUDIO_TYPE1:
/*
* Check whether cable type is
* SM5502_MUIC_ADC_AUDIO_TYPE1_FULL_REMOTE
* or SM5502_MUIC_ADC_AUDIO_TYPE1_SEND_END
* by using Button event.
*/
break;
case SM5502_MUIC_ADC_OPEN:
ret = regmap_read(info->regmap, SM5502_REG_DEV_TYPE1,
&dev_type1);
if (ret) {
dev_err(info->dev, "failed to read DEV_TYPE1 reg\n");
return ret;
}
if (dev_type1 == info->type->otg_dev_type1) {
cable_type = SM5502_MUIC_ADC_OPEN_USB_OTG;
break;
}
switch (dev_type1) {
case SM5502_REG_DEV_TYPE1_USB_SDP_MASK:
cable_type = SM5502_MUIC_ADC_OPEN_USB;
break;
case SM5502_REG_DEV_TYPE1_DEDICATED_CHG_MASK:
cable_type = SM5502_MUIC_ADC_OPEN_TA;
break;
default:
dev_dbg(info->dev,
"cannot identify the cable type: adc(0x%x)\n",
adc);
return -EINVAL;
}
break;
default:
dev_err(info->dev,
"failed to identify the cable type: adc(0x%x)\n", adc);
return -EINVAL;
}
return cable_type;
}
static int sm5502_muic_cable_handler(struct sm5502_muic_info *info,
bool attached)
{
static unsigned int prev_cable_type = SM5502_MUIC_ADC_GROUND;
unsigned int cable_type = SM5502_MUIC_ADC_GROUND;
unsigned int con_sw = DM_DP_SWITCH_OPEN;
unsigned int vbus_sw = VBUSIN_SWITCH_OPEN;
unsigned int id;
int ret;
/* Get the type of attached or detached cable */
if (attached)
cable_type = sm5502_muic_get_cable_type(info);
else
cable_type = prev_cable_type;
prev_cable_type = cable_type;
switch (cable_type) {
case SM5502_MUIC_ADC_OPEN_USB:
id = EXTCON_USB;
con_sw = DM_DP_SWITCH_USB;
vbus_sw = VBUSIN_SWITCH_VBUSOUT_WITH_USB;
break;
case SM5502_MUIC_ADC_OPEN_TA:
id = EXTCON_CHG_USB_DCP;
con_sw = DM_DP_SWITCH_OPEN;
vbus_sw = VBUSIN_SWITCH_VBUSOUT;
break;
case SM5502_MUIC_ADC_GROUND_USB_OTG:
case SM5502_MUIC_ADC_OPEN_USB_OTG:
id = EXTCON_USB_HOST;
con_sw = DM_DP_SWITCH_USB;
vbus_sw = VBUSIN_SWITCH_OPEN;
break;
default:
dev_dbg(info->dev,
"cannot handle this cable_type (0x%x)\n", cable_type);
return 0;
}
/* Change internal hardware path(DM_CON/DP_CON, VBUSIN) */
ret = sm5502_muic_set_path(info, con_sw, vbus_sw, attached);
if (ret < 0)
return ret;
/* Change the state of external accessory */
extcon_set_state_sync(info->edev, id, attached);
if (id == EXTCON_USB)
extcon_set_state_sync(info->edev, EXTCON_CHG_USB_SDP,
attached);
return 0;
}
static void sm5502_muic_irq_work(struct work_struct *work)
{
struct sm5502_muic_info *info = container_of(work,
struct sm5502_muic_info, irq_work);
int ret = 0;
if (!info->edev)
return;
mutex_lock(&info->mutex);
/* Detect attached or detached cables */
if (info->irq_attach) {
ret = sm5502_muic_cable_handler(info, true);
info->irq_attach = false;
}
if (info->irq_detach) {
ret = sm5502_muic_cable_handler(info, false);
info->irq_detach = false;
}
if (ret < 0)
dev_err(info->dev, "failed to handle MUIC interrupt\n");
mutex_unlock(&info->mutex);
}
/*
* Sets irq_attach or irq_detach in sm5502_muic_info and returns 0.
* Returns -ESRCH if irq_type does not match registered IRQ for this dev type.
*/
static int sm5502_parse_irq(struct sm5502_muic_info *info, int irq_type)
{
switch (irq_type) {
case SM5502_IRQ_INT1_ATTACH:
info->irq_attach = true;
break;
case SM5502_IRQ_INT1_DETACH:
info->irq_detach = true;
break;
case SM5502_IRQ_INT1_KP:
case SM5502_IRQ_INT1_LKP:
case SM5502_IRQ_INT1_LKR:
case SM5502_IRQ_INT1_OVP_EVENT:
case SM5502_IRQ_INT1_OCP_EVENT:
case SM5502_IRQ_INT1_OVP_OCP_DIS:
case SM5502_IRQ_INT2_VBUS_DET:
case SM5502_IRQ_INT2_REV_ACCE:
case SM5502_IRQ_INT2_ADC_CHG:
case SM5502_IRQ_INT2_STUCK_KEY:
case SM5502_IRQ_INT2_STUCK_KEY_RCV:
case SM5502_IRQ_INT2_MHL:
default:
break;
}
return 0;
}
static int sm5504_parse_irq(struct sm5502_muic_info *info, int irq_type)
{
switch (irq_type) {
case SM5504_IRQ_INT1_ATTACH:
info->irq_attach = true;
break;
case SM5504_IRQ_INT1_DETACH:
info->irq_detach = true;
break;
case SM5504_IRQ_INT1_CHG_DET:
case SM5504_IRQ_INT1_DCD_OUT:
case SM5504_IRQ_INT1_OVP_EVENT:
case SM5504_IRQ_INT1_CONNECT:
case SM5504_IRQ_INT1_ADC_CHG:
case SM5504_IRQ_INT2_RID_CHG:
case SM5504_IRQ_INT2_UVLO:
case SM5504_IRQ_INT2_POR:
case SM5504_IRQ_INT2_OVP_FET:
case SM5504_IRQ_INT2_OCP_LATCH:
case SM5504_IRQ_INT2_OCP_EVENT:
case SM5504_IRQ_INT2_OVP_OCP_EVENT:
default:
break;
}
return 0;
}
static irqreturn_t sm5502_muic_irq_handler(int irq, void *data)
{
struct sm5502_muic_info *info = data;
int i, irq_type = -1, ret;
for (i = 0; i < info->type->num_muic_irqs; i++)
if (irq == info->type->muic_irqs[i].virq)
irq_type = info->type->muic_irqs[i].irq;
ret = info->type->parse_irq(info, irq_type);
if (ret < 0) {
dev_warn(info->dev, "cannot handle is interrupt:%d\n",
irq_type);
return IRQ_HANDLED;
}
schedule_work(&info->irq_work);
return IRQ_HANDLED;
}
static void sm5502_muic_detect_cable_wq(struct work_struct *work)
{
struct sm5502_muic_info *info = container_of(to_delayed_work(work),
struct sm5502_muic_info, wq_detcable);
int ret;
/* Notify the state of connector cable or not */
ret = sm5502_muic_cable_handler(info, true);
if (ret < 0)
dev_warn(info->dev, "failed to detect cable state\n");
}
static void sm5502_init_dev_type(struct sm5502_muic_info *info)
{
unsigned int reg_data, vendor_id, version_id;
int i, ret;
/* To test I2C, Print version_id and vendor_id of SM5502 */
ret = regmap_read(info->regmap, SM5502_REG_DEVICE_ID, &reg_data);
if (ret) {
dev_err(info->dev,
"failed to read DEVICE_ID register: %d\n", ret);
return;
}
vendor_id = ((reg_data & SM5502_REG_DEVICE_ID_VENDOR_MASK) >>
SM5502_REG_DEVICE_ID_VENDOR_SHIFT);
version_id = ((reg_data & SM5502_REG_DEVICE_ID_VERSION_MASK) >>
SM5502_REG_DEVICE_ID_VERSION_SHIFT);
dev_info(info->dev, "Device type: version: 0x%x, vendor: 0x%x\n",
version_id, vendor_id);
/* Initiazle the register of SM5502 device to bring-up */
for (i = 0; i < info->type->num_reg_data; i++) {
unsigned int val = 0;
if (!info->type->reg_data[i].invert)
val |= ~info->type->reg_data[i].val;
else
val = info->type->reg_data[i].val;
regmap_write(info->regmap, info->type->reg_data[i].reg, val);
}
}
static int sm5022_muic_i2c_probe(struct i2c_client *i2c)
{
struct device_node *np = i2c->dev.of_node;
struct sm5502_muic_info *info;
int i, ret, irq_flags;
if (!np)
return -EINVAL;
info = devm_kzalloc(&i2c->dev, sizeof(*info), GFP_KERNEL);
if (!info)
return -ENOMEM;
i2c_set_clientdata(i2c, info);
info->dev = &i2c->dev;
info->i2c = i2c;
info->irq = i2c->irq;
info->type = device_get_match_data(info->dev);
if (!info->type)
return -EINVAL;
if (!info->type->parse_irq) {
dev_err(info->dev, "parse_irq missing in struct sm5502_type\n");
return -EINVAL;
}
mutex_init(&info->mutex);
INIT_WORK(&info->irq_work, sm5502_muic_irq_work);
info->regmap = devm_regmap_init_i2c(i2c, &sm5502_muic_regmap_config);
if (IS_ERR(info->regmap)) {
ret = PTR_ERR(info->regmap);
dev_err(info->dev, "failed to allocate register map: %d\n",
ret);
return ret;
}
/* Support irq domain for SM5502 MUIC device */
irq_flags = IRQF_TRIGGER_FALLING | IRQF_ONESHOT | IRQF_SHARED;
ret = devm_regmap_add_irq_chip(info->dev, info->regmap, info->irq,
irq_flags, 0, info->type->irq_chip,
&info->irq_data);
if (ret != 0) {
dev_err(info->dev, "failed to request IRQ %d: %d\n",
info->irq, ret);
return ret;
}
for (i = 0; i < info->type->num_muic_irqs; i++) {
struct muic_irq *muic_irq = &info->type->muic_irqs[i];
int virq = 0;
virq = regmap_irq_get_virq(info->irq_data, muic_irq->irq);
if (virq <= 0)
return -EINVAL;
muic_irq->virq = virq;
ret = devm_request_threaded_irq(info->dev, virq, NULL,
sm5502_muic_irq_handler,
IRQF_NO_SUSPEND | IRQF_ONESHOT,
muic_irq->name, info);
if (ret) {
dev_err(info->dev,
"failed: irq request (IRQ: %d, error :%d)\n",
muic_irq->irq, ret);
return ret;
}
}
/* Allocate extcon device */
info->edev = devm_extcon_dev_allocate(info->dev, sm5502_extcon_cable);
if (IS_ERR(info->edev)) {
dev_err(info->dev, "failed to allocate memory for extcon\n");
return -ENOMEM;
}
/* Register extcon device */
ret = devm_extcon_dev_register(info->dev, info->edev);
if (ret) {
dev_err(info->dev, "failed to register extcon device\n");
return ret;
}
/*
* 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, sm5502_muic_detect_cable_wq);
queue_delayed_work(system_power_efficient_wq, &info->wq_detcable,
msecs_to_jiffies(DELAY_MS_DEFAULT));
/* Initialize SM5502 device and print vendor id and version id */
sm5502_init_dev_type(info);
return 0;
}
static const struct sm5502_type sm5502_data = {
.muic_irqs = sm5502_muic_irqs,
.num_muic_irqs = ARRAY_SIZE(sm5502_muic_irqs),
.irq_chip = &sm5502_muic_irq_chip,
.reg_data = sm5502_reg_data,
.num_reg_data = ARRAY_SIZE(sm5502_reg_data),
.otg_dev_type1 = SM5502_REG_DEV_TYPE1_USB_OTG_MASK,
.parse_irq = sm5502_parse_irq,
};
static const struct sm5502_type sm5504_data = {
.muic_irqs = sm5504_muic_irqs,
.num_muic_irqs = ARRAY_SIZE(sm5504_muic_irqs),
.irq_chip = &sm5504_muic_irq_chip,
.reg_data = sm5504_reg_data,
.num_reg_data = ARRAY_SIZE(sm5504_reg_data),
.otg_dev_type1 = SM5504_REG_DEV_TYPE1_USB_OTG_MASK,
.parse_irq = sm5504_parse_irq,
};
static const struct of_device_id sm5502_dt_match[] = {
{ .compatible = "siliconmitus,sm5502-muic", .data = &sm5502_data },
{ .compatible = "siliconmitus,sm5504-muic", .data = &sm5504_data },
{ .compatible = "siliconmitus,sm5703-muic", .data = &sm5502_data },
{ },
};
MODULE_DEVICE_TABLE(of, sm5502_dt_match);
#ifdef CONFIG_PM_SLEEP
static int sm5502_muic_suspend(struct device *dev)
{
struct i2c_client *i2c = to_i2c_client(dev);
struct sm5502_muic_info *info = i2c_get_clientdata(i2c);
enable_irq_wake(info->irq);
return 0;
}
static int sm5502_muic_resume(struct device *dev)
{
struct i2c_client *i2c = to_i2c_client(dev);
struct sm5502_muic_info *info = i2c_get_clientdata(i2c);
disable_irq_wake(info->irq);
return 0;
}
#endif
static SIMPLE_DEV_PM_OPS(sm5502_muic_pm_ops,
sm5502_muic_suspend, sm5502_muic_resume);
static const struct i2c_device_id sm5502_i2c_id[] = {
{ "sm5502", (kernel_ulong_t)&sm5502_data },
{ "sm5504", (kernel_ulong_t)&sm5504_data },
{ "sm5703-muic", (kernel_ulong_t)&sm5502_data },
{ }
};
MODULE_DEVICE_TABLE(i2c, sm5502_i2c_id);
static struct i2c_driver sm5502_muic_i2c_driver = {
.driver = {
.name = "sm5502",
.pm = &sm5502_muic_pm_ops,
.of_match_table = sm5502_dt_match,
},
6.5.5
2023-10-24 12:59:35 +02:00
.probe = sm5022_muic_i2c_probe,
Initial commit
2023-08-30 17:31:07 +02:00
.id_table = sm5502_i2c_id,
};
static int __init sm5502_muic_i2c_init(void)
{
return i2c_add_driver(&sm5502_muic_i2c_driver);
}
subsys_initcall(sm5502_muic_i2c_init);
MODULE_DESCRIPTION("Silicon Mitus SM5502 Extcon driver");
MODULE_AUTHOR("Chanwoo Choi <cw00.choi@samsung.com>");
MODULE_LICENSE("GPL");