856 lines
24 KiB
C
856 lines
24 KiB
C
// SPDX-License-Identifier: GPL-2.0-or-later
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/*
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* extcon-sm5502.c - Silicon Mitus SM5502 extcon drvier to support USB switches
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*
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* Copyright (c) 2014 Samsung Electronics Co., Ltd
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* Author: Chanwoo Choi <cw00.choi@samsung.com>
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*/
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#include <linux/err.h>
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#include <linux/i2c.h>
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#include <linux/interrupt.h>
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#include <linux/irqdomain.h>
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#include <linux/kernel.h>
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#include <linux/module.h>
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#include <linux/platform_device.h>
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#include <linux/regmap.h>
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#include <linux/slab.h>
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#include <linux/extcon-provider.h>
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#include "extcon-sm5502.h"
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#define DELAY_MS_DEFAULT 17000 /* unit: millisecond */
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struct muic_irq {
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unsigned int irq;
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const char *name;
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unsigned int virq;
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};
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struct reg_data {
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u8 reg;
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unsigned int val;
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bool invert;
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};
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struct sm5502_muic_info {
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struct device *dev;
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struct extcon_dev *edev;
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struct i2c_client *i2c;
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struct regmap *regmap;
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const struct sm5502_type *type;
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struct regmap_irq_chip_data *irq_data;
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int irq;
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bool irq_attach;
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bool irq_detach;
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struct work_struct irq_work;
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struct mutex mutex;
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/*
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* Use delayed workqueue to detect cable state and then
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* notify cable state to notifiee/platform through uevent.
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* After completing the booting of platform, the extcon provider
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* driver should notify cable state to upper layer.
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*/
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struct delayed_work wq_detcable;
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};
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struct sm5502_type {
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struct muic_irq *muic_irqs;
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unsigned int num_muic_irqs;
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const struct regmap_irq_chip *irq_chip;
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struct reg_data *reg_data;
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unsigned int num_reg_data;
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unsigned int otg_dev_type1;
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int (*parse_irq)(struct sm5502_muic_info *info, int irq_type);
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};
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/* Default value of SM5502 register to bring up MUIC device. */
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static struct reg_data sm5502_reg_data[] = {
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{
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.reg = SM5502_REG_RESET,
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.val = SM5502_REG_RESET_MASK,
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.invert = true,
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}, {
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.reg = SM5502_REG_CONTROL,
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.val = SM5502_REG_CONTROL_MASK_INT_MASK,
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.invert = false,
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}, {
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.reg = SM5502_REG_INTMASK1,
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.val = SM5502_REG_INTM1_KP_MASK
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| SM5502_REG_INTM1_LKP_MASK
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| SM5502_REG_INTM1_LKR_MASK,
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.invert = true,
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}, {
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.reg = SM5502_REG_INTMASK2,
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.val = SM5502_REG_INTM2_VBUS_DET_MASK
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| SM5502_REG_INTM2_REV_ACCE_MASK
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| SM5502_REG_INTM2_ADC_CHG_MASK
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| SM5502_REG_INTM2_STUCK_KEY_MASK
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| SM5502_REG_INTM2_STUCK_KEY_RCV_MASK
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| SM5502_REG_INTM2_MHL_MASK,
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.invert = true,
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},
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};
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/* Default value of SM5504 register to bring up MUIC device. */
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static struct reg_data sm5504_reg_data[] = {
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{
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.reg = SM5502_REG_RESET,
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.val = SM5502_REG_RESET_MASK,
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.invert = true,
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}, {
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.reg = SM5502_REG_INTMASK1,
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.val = SM5504_REG_INTM1_ATTACH_MASK
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| SM5504_REG_INTM1_DETACH_MASK,
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.invert = false,
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}, {
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.reg = SM5502_REG_INTMASK2,
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.val = SM5504_REG_INTM2_RID_CHG_MASK
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| SM5504_REG_INTM2_UVLO_MASK
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| SM5504_REG_INTM2_POR_MASK,
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.invert = true,
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}, {
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.reg = SM5502_REG_CONTROL,
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.val = SM5502_REG_CONTROL_MANUAL_SW_MASK
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| SM5504_REG_CONTROL_CHGTYP_MASK
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| SM5504_REG_CONTROL_USBCHDEN_MASK
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| SM5504_REG_CONTROL_ADC_EN_MASK,
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.invert = true,
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},
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};
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/* List of detectable cables */
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static const unsigned int sm5502_extcon_cable[] = {
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EXTCON_USB,
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EXTCON_USB_HOST,
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EXTCON_CHG_USB_SDP,
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EXTCON_CHG_USB_DCP,
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EXTCON_NONE,
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};
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/* Define supported accessory type */
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enum sm5502_muic_acc_type {
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SM5502_MUIC_ADC_GROUND = 0x0,
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SM5502_MUIC_ADC_SEND_END_BUTTON,
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SM5502_MUIC_ADC_REMOTE_S1_BUTTON,
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SM5502_MUIC_ADC_REMOTE_S2_BUTTON,
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SM5502_MUIC_ADC_REMOTE_S3_BUTTON,
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SM5502_MUIC_ADC_REMOTE_S4_BUTTON,
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SM5502_MUIC_ADC_REMOTE_S5_BUTTON,
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SM5502_MUIC_ADC_REMOTE_S6_BUTTON,
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SM5502_MUIC_ADC_REMOTE_S7_BUTTON,
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SM5502_MUIC_ADC_REMOTE_S8_BUTTON,
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SM5502_MUIC_ADC_REMOTE_S9_BUTTON,
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SM5502_MUIC_ADC_REMOTE_S10_BUTTON,
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SM5502_MUIC_ADC_REMOTE_S11_BUTTON,
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SM5502_MUIC_ADC_REMOTE_S12_BUTTON,
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SM5502_MUIC_ADC_RESERVED_ACC_1,
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SM5502_MUIC_ADC_RESERVED_ACC_2,
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SM5502_MUIC_ADC_RESERVED_ACC_3,
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SM5502_MUIC_ADC_RESERVED_ACC_4,
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SM5502_MUIC_ADC_RESERVED_ACC_5,
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SM5502_MUIC_ADC_AUDIO_TYPE2,
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SM5502_MUIC_ADC_PHONE_POWERED_DEV,
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SM5502_MUIC_ADC_TTY_CONVERTER,
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SM5502_MUIC_ADC_UART_CABLE,
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SM5502_MUIC_ADC_TYPE1_CHARGER,
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SM5502_MUIC_ADC_FACTORY_MODE_BOOT_OFF_USB,
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SM5502_MUIC_ADC_FACTORY_MODE_BOOT_ON_USB,
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SM5502_MUIC_ADC_AUDIO_VIDEO_CABLE,
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SM5502_MUIC_ADC_TYPE2_CHARGER,
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SM5502_MUIC_ADC_FACTORY_MODE_BOOT_OFF_UART,
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SM5502_MUIC_ADC_FACTORY_MODE_BOOT_ON_UART,
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SM5502_MUIC_ADC_AUDIO_TYPE1,
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SM5502_MUIC_ADC_OPEN = 0x1f,
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/*
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* The below accessories have same ADC value (0x1f or 0x1e).
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* So, Device type1 is used to separate specific accessory.
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*/
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/* |---------|--ADC| */
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/* | [7:5]|[4:0]| */
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SM5502_MUIC_ADC_AUDIO_TYPE1_FULL_REMOTE = 0x3e, /* | 001|11110| */
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SM5502_MUIC_ADC_AUDIO_TYPE1_SEND_END = 0x5e, /* | 010|11110| */
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/* |Dev Type1|--ADC| */
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SM5502_MUIC_ADC_GROUND_USB_OTG = 0x80, /* | 100|00000| */
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SM5502_MUIC_ADC_OPEN_USB = 0x5f, /* | 010|11111| */
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SM5502_MUIC_ADC_OPEN_TA = 0xdf, /* | 110|11111| */
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SM5502_MUIC_ADC_OPEN_USB_OTG = 0xff, /* | 111|11111| */
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};
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/* List of supported interrupt for SM5502 */
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static struct muic_irq sm5502_muic_irqs[] = {
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{ SM5502_IRQ_INT1_ATTACH, "muic-attach" },
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{ SM5502_IRQ_INT1_DETACH, "muic-detach" },
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{ SM5502_IRQ_INT1_KP, "muic-kp" },
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{ SM5502_IRQ_INT1_LKP, "muic-lkp" },
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{ SM5502_IRQ_INT1_LKR, "muic-lkr" },
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{ SM5502_IRQ_INT1_OVP_EVENT, "muic-ovp-event" },
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{ SM5502_IRQ_INT1_OCP_EVENT, "muic-ocp-event" },
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{ SM5502_IRQ_INT1_OVP_OCP_DIS, "muic-ovp-ocp-dis" },
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{ SM5502_IRQ_INT2_VBUS_DET, "muic-vbus-det" },
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{ SM5502_IRQ_INT2_REV_ACCE, "muic-rev-acce" },
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{ SM5502_IRQ_INT2_ADC_CHG, "muic-adc-chg" },
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{ SM5502_IRQ_INT2_STUCK_KEY, "muic-stuck-key" },
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{ SM5502_IRQ_INT2_STUCK_KEY_RCV, "muic-stuck-key-rcv" },
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{ SM5502_IRQ_INT2_MHL, "muic-mhl" },
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};
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/* Define interrupt list of SM5502 to register regmap_irq */
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static const struct regmap_irq sm5502_irqs[] = {
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/* INT1 interrupts */
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{ .reg_offset = 0, .mask = SM5502_IRQ_INT1_ATTACH_MASK, },
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{ .reg_offset = 0, .mask = SM5502_IRQ_INT1_DETACH_MASK, },
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{ .reg_offset = 0, .mask = SM5502_IRQ_INT1_KP_MASK, },
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{ .reg_offset = 0, .mask = SM5502_IRQ_INT1_LKP_MASK, },
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{ .reg_offset = 0, .mask = SM5502_IRQ_INT1_LKR_MASK, },
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{ .reg_offset = 0, .mask = SM5502_IRQ_INT1_OVP_EVENT_MASK, },
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{ .reg_offset = 0, .mask = SM5502_IRQ_INT1_OCP_EVENT_MASK, },
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{ .reg_offset = 0, .mask = SM5502_IRQ_INT1_OVP_OCP_DIS_MASK, },
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/* INT2 interrupts */
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{ .reg_offset = 1, .mask = SM5502_IRQ_INT2_VBUS_DET_MASK,},
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{ .reg_offset = 1, .mask = SM5502_IRQ_INT2_REV_ACCE_MASK, },
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{ .reg_offset = 1, .mask = SM5502_IRQ_INT2_ADC_CHG_MASK, },
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{ .reg_offset = 1, .mask = SM5502_IRQ_INT2_STUCK_KEY_MASK, },
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{ .reg_offset = 1, .mask = SM5502_IRQ_INT2_STUCK_KEY_RCV_MASK, },
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{ .reg_offset = 1, .mask = SM5502_IRQ_INT2_MHL_MASK, },
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};
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static const struct regmap_irq_chip sm5502_muic_irq_chip = {
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.name = "sm5502",
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.status_base = SM5502_REG_INT1,
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.mask_base = SM5502_REG_INTMASK1,
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.num_regs = 2,
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.irqs = sm5502_irqs,
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.num_irqs = ARRAY_SIZE(sm5502_irqs),
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};
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/* List of supported interrupt for SM5504 */
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static struct muic_irq sm5504_muic_irqs[] = {
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{ SM5504_IRQ_INT1_ATTACH, "muic-attach" },
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{ SM5504_IRQ_INT1_DETACH, "muic-detach" },
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{ SM5504_IRQ_INT1_CHG_DET, "muic-chg-det" },
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{ SM5504_IRQ_INT1_DCD_OUT, "muic-dcd-out" },
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{ SM5504_IRQ_INT1_OVP_EVENT, "muic-ovp-event" },
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{ SM5504_IRQ_INT1_CONNECT, "muic-connect" },
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{ SM5504_IRQ_INT1_ADC_CHG, "muic-adc-chg" },
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{ SM5504_IRQ_INT2_RID_CHG, "muic-rid-chg" },
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{ SM5504_IRQ_INT2_UVLO, "muic-uvlo" },
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{ SM5504_IRQ_INT2_POR, "muic-por" },
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{ SM5504_IRQ_INT2_OVP_FET, "muic-ovp-fet" },
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{ SM5504_IRQ_INT2_OCP_LATCH, "muic-ocp-latch" },
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{ SM5504_IRQ_INT2_OCP_EVENT, "muic-ocp-event" },
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{ SM5504_IRQ_INT2_OVP_OCP_EVENT, "muic-ovp-ocp-event" },
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};
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/* Define interrupt list of SM5504 to register regmap_irq */
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static const struct regmap_irq sm5504_irqs[] = {
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/* INT1 interrupts */
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{ .reg_offset = 0, .mask = SM5504_IRQ_INT1_ATTACH_MASK, },
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{ .reg_offset = 0, .mask = SM5504_IRQ_INT1_DETACH_MASK, },
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{ .reg_offset = 0, .mask = SM5504_IRQ_INT1_CHG_DET_MASK, },
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{ .reg_offset = 0, .mask = SM5504_IRQ_INT1_DCD_OUT_MASK, },
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{ .reg_offset = 0, .mask = SM5504_IRQ_INT1_OVP_MASK, },
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{ .reg_offset = 0, .mask = SM5504_IRQ_INT1_CONNECT_MASK, },
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{ .reg_offset = 0, .mask = SM5504_IRQ_INT1_ADC_CHG_MASK, },
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/* INT2 interrupts */
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{ .reg_offset = 1, .mask = SM5504_IRQ_INT2_RID_CHG_MASK,},
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{ .reg_offset = 1, .mask = SM5504_IRQ_INT2_UVLO_MASK, },
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{ .reg_offset = 1, .mask = SM5504_IRQ_INT2_POR_MASK, },
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{ .reg_offset = 1, .mask = SM5504_IRQ_INT2_OVP_FET_MASK, },
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{ .reg_offset = 1, .mask = SM5504_IRQ_INT2_OCP_LATCH_MASK, },
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{ .reg_offset = 1, .mask = SM5504_IRQ_INT2_OCP_EVENT_MASK, },
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{ .reg_offset = 1, .mask = SM5504_IRQ_INT2_OVP_OCP_EVENT_MASK, },
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};
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static const struct regmap_irq_chip sm5504_muic_irq_chip = {
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.name = "sm5504",
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.status_base = SM5502_REG_INT1,
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.mask_base = SM5502_REG_INTMASK1,
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.num_regs = 2,
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.irqs = sm5504_irqs,
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.num_irqs = ARRAY_SIZE(sm5504_irqs),
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};
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/* Define regmap configuration of SM5502 for I2C communication */
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static bool sm5502_muic_volatile_reg(struct device *dev, unsigned int reg)
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{
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switch (reg) {
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case SM5502_REG_INTMASK1:
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case SM5502_REG_INTMASK2:
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return true;
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default:
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break;
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}
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return false;
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}
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static const struct regmap_config sm5502_muic_regmap_config = {
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.reg_bits = 8,
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.val_bits = 8,
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.volatile_reg = sm5502_muic_volatile_reg,
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.max_register = SM5502_REG_END,
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};
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/* Change DM_CON/DP_CON/VBUSIN switch according to cable type */
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static int sm5502_muic_set_path(struct sm5502_muic_info *info,
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unsigned int con_sw, unsigned int vbus_sw,
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bool attached)
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{
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int ret;
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if (!attached) {
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con_sw = DM_DP_SWITCH_OPEN;
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vbus_sw = VBUSIN_SWITCH_OPEN;
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}
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switch (con_sw) {
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case DM_DP_SWITCH_OPEN:
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case DM_DP_SWITCH_USB:
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case DM_DP_SWITCH_AUDIO:
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case DM_DP_SWITCH_UART:
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ret = regmap_update_bits(info->regmap, SM5502_REG_MANUAL_SW1,
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SM5502_REG_MANUAL_SW1_DP_MASK |
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SM5502_REG_MANUAL_SW1_DM_MASK,
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con_sw);
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if (ret < 0) {
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dev_err(info->dev,
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"cannot update DM_CON/DP_CON switch\n");
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return ret;
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}
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break;
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default:
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dev_err(info->dev, "Unknown DM_CON/DP_CON switch type (%d)\n",
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con_sw);
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return -EINVAL;
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}
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switch (vbus_sw) {
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case VBUSIN_SWITCH_OPEN:
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case VBUSIN_SWITCH_VBUSOUT:
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case VBUSIN_SWITCH_MIC:
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case VBUSIN_SWITCH_VBUSOUT_WITH_USB:
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ret = regmap_update_bits(info->regmap, SM5502_REG_MANUAL_SW1,
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SM5502_REG_MANUAL_SW1_VBUSIN_MASK,
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vbus_sw);
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if (ret < 0) {
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dev_err(info->dev,
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"cannot update VBUSIN switch\n");
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return ret;
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}
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break;
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default:
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dev_err(info->dev, "Unknown VBUS switch type (%d)\n", vbus_sw);
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return -EINVAL;
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}
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return 0;
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}
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/* Return cable type of attached or detached accessories */
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static unsigned int sm5502_muic_get_cable_type(struct sm5502_muic_info *info)
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{
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unsigned int cable_type, adc, dev_type1;
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int ret;
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/* Read ADC value according to external cable or button */
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ret = regmap_read(info->regmap, SM5502_REG_ADC, &adc);
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if (ret) {
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dev_err(info->dev, "failed to read ADC register\n");
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return ret;
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}
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/*
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* If ADC is SM5502_MUIC_ADC_GROUND(0x0), external cable hasn't
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* connected with to MUIC device.
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*/
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cable_type = adc & SM5502_REG_ADC_MASK;
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switch (cable_type) {
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case SM5502_MUIC_ADC_GROUND:
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ret = regmap_read(info->regmap, SM5502_REG_DEV_TYPE1,
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&dev_type1);
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if (ret) {
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dev_err(info->dev, "failed to read DEV_TYPE1 reg\n");
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return ret;
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}
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if (dev_type1 == info->type->otg_dev_type1) {
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cable_type = SM5502_MUIC_ADC_GROUND_USB_OTG;
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} else {
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dev_dbg(info->dev,
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"cannot identify the cable type: adc(0x%x), dev_type1(0x%x)\n",
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adc, dev_type1);
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return -EINVAL;
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}
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break;
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case SM5502_MUIC_ADC_SEND_END_BUTTON:
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case SM5502_MUIC_ADC_REMOTE_S1_BUTTON:
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case SM5502_MUIC_ADC_REMOTE_S2_BUTTON:
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case SM5502_MUIC_ADC_REMOTE_S3_BUTTON:
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case SM5502_MUIC_ADC_REMOTE_S4_BUTTON:
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case SM5502_MUIC_ADC_REMOTE_S5_BUTTON:
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case SM5502_MUIC_ADC_REMOTE_S6_BUTTON:
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case SM5502_MUIC_ADC_REMOTE_S7_BUTTON:
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case SM5502_MUIC_ADC_REMOTE_S8_BUTTON:
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case SM5502_MUIC_ADC_REMOTE_S9_BUTTON:
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case SM5502_MUIC_ADC_REMOTE_S10_BUTTON:
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case SM5502_MUIC_ADC_REMOTE_S11_BUTTON:
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case SM5502_MUIC_ADC_REMOTE_S12_BUTTON:
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case SM5502_MUIC_ADC_RESERVED_ACC_1:
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case SM5502_MUIC_ADC_RESERVED_ACC_2:
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case SM5502_MUIC_ADC_RESERVED_ACC_3:
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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, ®_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,
|
|
},
|
|
.probe_new = sm5022_muic_i2c_probe,
|
|
.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");
|