--- /dev/null
+/*
+ * 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,
+};
+
+enum {
+ MAX77843_CABLE_USB = 0,
+ MAX77843_CABLE_USB_HOST,
+ MAX77843_CABLE_TA,
+ MAX77843_CABLE_CHARGE_DOWNSTREAM,
+ MAX77843_CABLE_FAST_CHARGER,
+ MAX77843_CABLE_SLOW_CHARGER,
+ MAX77843_CABLE_MHL,
+ MAX77843_CABLE_MHL_TA,
+ MAX77843_CABLE_JIG_USB_ON,
+ MAX77843_CABLE_JIG_USB_OFF,
+ MAX77843_CABLE_JIG_UART_ON,
+ MAX77843_CABLE_JIG_UART_OFF,
+
+ MAX77843_CABLE_NUM,
+};
+
+static const char *max77843_extcon_cable[] = {
+ [MAX77843_CABLE_USB] = "USB",
+ [MAX77843_CABLE_USB_HOST] = "USB-HOST",
+ [MAX77843_CABLE_TA] = "TA",
+ [MAX77843_CABLE_CHARGE_DOWNSTREAM] = "CHARGER-DOWNSTREAM",
+ [MAX77843_CABLE_FAST_CHARGER] = "FAST-CHARGER",
+ [MAX77843_CABLE_SLOW_CHARGER] = "SLOW-CHARGER",
+ [MAX77843_CABLE_MHL] = "MHL",
+ [MAX77843_CABLE_MHL_TA] = "MHL-TA",
+ [MAX77843_CABLE_JIG_USB_ON] = "JIG-USB-ON",
+ [MAX77843_CABLE_JIG_USB_OFF] = "JIG-USB-OFF",
+ [MAX77843_CABLE_JIG_UART_ON] = "JIG-UART-ON",
+ [MAX77843_CABLE_JIG_UART_OFF] = "JIG-UART-OFF",
+};
+
+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, "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, "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;
+
+ 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:
+ ret = max77843_muic_set_path(info, CONTROL1_SW_USB, attached);
+ if (ret < 0)
+ return ret;
+ extcon_set_cable_state(info->edev, "JIG-USB-OFF", attached);
+ break;
+ case MAX77843_MUIC_ADC_FACTORY_MODE_USB_ON:
+ ret = max77843_muic_set_path(info, CONTROL1_SW_USB, attached);
+ if (ret < 0)
+ return ret;
+ extcon_set_cable_state(info->edev, "JIG-USB-ON", attached);
+ break;
+ case MAX77843_MUIC_ADC_FACTORY_MODE_UART_OFF:
+ ret = max77843_muic_set_path(info, CONTROL1_SW_UART, attached);
+ if (ret < 0)
+ return ret;
+ extcon_set_cable_state(info->edev, "JIG-UART-OFF", attached);
+ break;
+ default:
+ ret = max77843_muic_set_path(info, CONTROL1_SW_OPEN, attached);
+ if (ret < 0)
+ return ret;
+ break;
+ }
+
+ 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, "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,
+ "CHARGER-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, "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, "SLOW-CHAREGER", 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, "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, "MHL-TA", true);
+ else if (gnd_type == MAX77843_MUIC_GND_MHL)
+ extcon_set_cable_state(info->edev, "MHL-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;
+ unsigned 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 PTR_ERR(max77843->i2c_muic);
+ }
+
+ 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");
projects / mirror_ubuntu-artful-kernel.git / commitdiff