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@@ -0,0 +1,752 @@
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+/*
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+ * extcon-max14577.c - MAX14577 extcon driver to support MAX14577 MUIC
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+ *
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+ * Copyright (C) 2013 Samsung Electrnoics
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+ * Chanwoo Choi <cw00.choi@samsung.com>
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+ *
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+ * This program is free software; you can redistribute it and/or modify
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+ * it under the terms of the GNU General Public License as published by
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+ * the Free Software Foundation; either version 2 of the License, or
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+ * (at your option) any later version.
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+ *
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+ * This program is distributed in the hope that it will be useful,
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+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
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+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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+ * GNU General Public License for more details.
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+ */
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+
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+#include <linux/kernel.h>
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+#include <linux/module.h>
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+#include <linux/i2c.h>
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+#include <linux/interrupt.h>
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+#include <linux/platform_device.h>
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+#include <linux/mfd/max14577.h>
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+#include <linux/mfd/max14577-private.h>
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+#include <linux/extcon.h>
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+
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+#define DEV_NAME "max14577-muic"
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+#define DELAY_MS_DEFAULT 17000 /* unit: millisecond */
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+
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+enum max14577_muic_adc_debounce_time {
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+ ADC_DEBOUNCE_TIME_5MS = 0,
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+ ADC_DEBOUNCE_TIME_10MS,
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+ ADC_DEBOUNCE_TIME_25MS,
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+ ADC_DEBOUNCE_TIME_38_62MS,
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+};
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+
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+enum max14577_muic_status {
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+ MAX14577_MUIC_STATUS1 = 0,
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+ MAX14577_MUIC_STATUS2 = 1,
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+ MAX14577_MUIC_STATUS_END,
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+};
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+
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+struct max14577_muic_info {
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+ struct device *dev;
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+ struct max14577 *max14577;
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+ struct extcon_dev *edev;
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+ int prev_cable_type;
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+ int prev_chg_type;
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+ u8 status[MAX14577_MUIC_STATUS_END];
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+
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+ bool irq_adc;
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+ bool irq_chg;
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+ struct work_struct irq_work;
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+ struct mutex mutex;
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+
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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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+ /*
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+ * Default usb/uart path whether UART/USB or AUX_UART/AUX_USB
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+ * h/w path of COMP2/COMN1 on CONTROL1 register.
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+ */
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+ int path_usb;
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+ int path_uart;
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+};
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+
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+enum max14577_muic_cable_group {
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+ MAX14577_CABLE_GROUP_ADC = 0,
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+ MAX14577_CABLE_GROUP_CHG,
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+};
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+
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+/**
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+ * struct max14577_muic_irq
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+ * @irq: the index of irq list of MUIC device.
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+ * @name: the name of irq.
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+ * @virq: the virtual irq to use irq domain
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+ */
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+struct max14577_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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+
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+static struct max14577_muic_irq muic_irqs[] = {
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+ { MAX14577_IRQ_INT1_ADC, "muic-ADC" },
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+ { MAX14577_IRQ_INT1_ADCLOW, "muic-ADCLOW" },
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+ { MAX14577_IRQ_INT1_ADCERR, "muic-ADCError" },
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+ { MAX14577_IRQ_INT2_CHGTYP, "muic-CHGTYP" },
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+ { MAX14577_IRQ_INT2_CHGDETRUN, "muic-CHGDETRUN" },
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+ { MAX14577_IRQ_INT2_DCDTMR, "muic-DCDTMR" },
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+ { MAX14577_IRQ_INT2_DBCHG, "muic-DBCHG" },
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+ { MAX14577_IRQ_INT2_VBVOLT, "muic-VBVOLT" },
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+};
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+
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+/* Define supported accessory type */
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+enum max14577_muic_acc_type {
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+ MAX14577_MUIC_ADC_GROUND = 0x0,
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+ MAX14577_MUIC_ADC_SEND_END_BUTTON,
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+ MAX14577_MUIC_ADC_REMOTE_S1_BUTTON,
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+ MAX14577_MUIC_ADC_REMOTE_S2_BUTTON,
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+ MAX14577_MUIC_ADC_REMOTE_S3_BUTTON,
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+ MAX14577_MUIC_ADC_REMOTE_S4_BUTTON,
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+ MAX14577_MUIC_ADC_REMOTE_S5_BUTTON,
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+ MAX14577_MUIC_ADC_REMOTE_S6_BUTTON,
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+ MAX14577_MUIC_ADC_REMOTE_S7_BUTTON,
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+ MAX14577_MUIC_ADC_REMOTE_S8_BUTTON,
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+ MAX14577_MUIC_ADC_REMOTE_S9_BUTTON,
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+ MAX14577_MUIC_ADC_REMOTE_S10_BUTTON,
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+ MAX14577_MUIC_ADC_REMOTE_S11_BUTTON,
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+ MAX14577_MUIC_ADC_REMOTE_S12_BUTTON,
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+ MAX14577_MUIC_ADC_RESERVED_ACC_1,
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+ MAX14577_MUIC_ADC_RESERVED_ACC_2,
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+ MAX14577_MUIC_ADC_RESERVED_ACC_3,
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+ MAX14577_MUIC_ADC_RESERVED_ACC_4,
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+ MAX14577_MUIC_ADC_RESERVED_ACC_5,
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+ MAX14577_MUIC_ADC_AUDIO_DEVICE_TYPE2,
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+ MAX14577_MUIC_ADC_PHONE_POWERED_DEV,
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+ MAX14577_MUIC_ADC_TTY_CONVERTER,
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+ MAX14577_MUIC_ADC_UART_CABLE,
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+ MAX14577_MUIC_ADC_CEA936A_TYPE1_CHG,
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+ MAX14577_MUIC_ADC_FACTORY_MODE_USB_OFF,
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+ MAX14577_MUIC_ADC_FACTORY_MODE_USB_ON,
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+ MAX14577_MUIC_ADC_AV_CABLE_NOLOAD,
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+ MAX14577_MUIC_ADC_CEA936A_TYPE2_CHG,
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+ MAX14577_MUIC_ADC_FACTORY_MODE_UART_OFF,
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+ MAX14577_MUIC_ADC_FACTORY_MODE_UART_ON,
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+ MAX14577_MUIC_ADC_AUDIO_DEVICE_TYPE1, /* with Remote and Simple Ctrl */
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+ MAX14577_MUIC_ADC_OPEN,
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+};
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+
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+/* max14577 MUIC device support below list of accessories(external connector) */
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+enum {
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+ EXTCON_CABLE_USB = 0,
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+ EXTCON_CABLE_TA,
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+ EXTCON_CABLE_FAST_CHARGER,
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+ EXTCON_CABLE_SLOW_CHARGER,
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+ EXTCON_CABLE_CHARGE_DOWNSTREAM,
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+ EXTCON_CABLE_JIG_USB_ON,
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+ EXTCON_CABLE_JIG_USB_OFF,
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+ EXTCON_CABLE_JIG_UART_OFF,
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+ EXTCON_CABLE_JIG_UART_ON,
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+
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+ _EXTCON_CABLE_NUM,
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+};
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+
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+static const char *max14577_extcon_cable[] = {
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+ [EXTCON_CABLE_USB] = "USB",
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+ [EXTCON_CABLE_TA] = "TA",
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+ [EXTCON_CABLE_FAST_CHARGER] = "Fast-charger",
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+ [EXTCON_CABLE_SLOW_CHARGER] = "Slow-charger",
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+ [EXTCON_CABLE_CHARGE_DOWNSTREAM] = "Charge-downstream",
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+ [EXTCON_CABLE_JIG_USB_ON] = "JIG-USB-ON",
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+ [EXTCON_CABLE_JIG_USB_OFF] = "JIG-USB-OFF",
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+ [EXTCON_CABLE_JIG_UART_OFF] = "JIG-UART-OFF",
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+ [EXTCON_CABLE_JIG_UART_ON] = "JIG-UART-ON",
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+
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+ NULL,
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+};
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+
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+/*
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+ * max14577_muic_set_debounce_time - Set the debounce time of ADC
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+ * @info: the instance including private data of max14577 MUIC
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+ * @time: the debounce time of ADC
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+ */
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+static int max14577_muic_set_debounce_time(struct max14577_muic_info *info,
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+ enum max14577_muic_adc_debounce_time time)
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+{
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+ u8 ret;
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+
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+ switch (time) {
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+ case ADC_DEBOUNCE_TIME_5MS:
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+ case ADC_DEBOUNCE_TIME_10MS:
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+ case ADC_DEBOUNCE_TIME_25MS:
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+ case ADC_DEBOUNCE_TIME_38_62MS:
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+ ret = max14577_update_reg(info->max14577->regmap,
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+ MAX14577_MUIC_REG_CONTROL3,
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+ CTRL3_ADCDBSET_MASK,
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+ time << CTRL3_ADCDBSET_SHIFT);
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+ if (ret) {
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+ dev_err(info->dev, "failed to set ADC debounce time\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, "invalid ADC debounce time\n");
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+ return -EINVAL;
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+ }
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+
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+ return 0;
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+};
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+
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+/*
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+ * max14577_muic_set_path - Set hardware line according to attached cable
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+ * @info: the instance including private data of max14577 MUIC
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+ * @value: the path according to attached cable
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+ * @attached: the state of cable (true:attached, false:detached)
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+ *
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+ * The max14577 MUIC device share outside H/W line among a varity of cables
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+ * so, this function set internal path of H/W line according to the type of
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+ * attached cable.
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+ */
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+static int max14577_muic_set_path(struct max14577_muic_info *info,
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+ u8 val, bool attached)
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+{
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+ int ret = 0;
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+ u8 ctrl1, ctrl2 = 0;
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+
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+ /* Set open state to path before changing hw path */
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+ ret = max14577_update_reg(info->max14577->regmap,
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+ MAX14577_MUIC_REG_CONTROL1,
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+ CLEAR_IDBEN_MICEN_MASK, CTRL1_SW_OPEN);
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+ if (ret < 0) {
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+ dev_err(info->dev, "failed to update MUIC register\n");
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+ return ret;
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+ }
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+
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+ if (attached)
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+ ctrl1 = val;
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+ else
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+ ctrl1 = CTRL1_SW_OPEN;
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+
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+ ret = max14577_update_reg(info->max14577->regmap,
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+ MAX14577_MUIC_REG_CONTROL1,
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+ CLEAR_IDBEN_MICEN_MASK, ctrl1);
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+ if (ret < 0) {
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+ dev_err(info->dev, "failed to update MUIC register\n");
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+ return ret;
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+ }
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+
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+ if (attached)
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+ ctrl2 |= CTRL2_CPEN_MASK; /* LowPwr=0, CPEn=1 */
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+ else
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+ ctrl2 |= CTRL2_LOWPWR_MASK; /* LowPwr=1, CPEn=0 */
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+
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+ ret = max14577_update_reg(info->max14577->regmap,
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+ MAX14577_REG_CONTROL2,
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+ CTRL2_LOWPWR_MASK | CTRL2_CPEN_MASK, ctrl2);
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+ if (ret < 0) {
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+ dev_err(info->dev, "failed to update MUIC register\n");
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+ return ret;
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+ }
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+
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+ dev_dbg(info->dev,
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+ "CONTROL1 : 0x%02x, CONTROL2 : 0x%02x, state : %s\n",
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+ ctrl1, ctrl2, attached ? "attached" : "detached");
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+
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+ return 0;
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+}
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+
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+/*
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+ * max14577_muic_get_cable_type - Return cable type and check cable state
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+ * @info: the instance including private data of max14577 MUIC
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+ * @group: the path according to attached cable
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+ * @attached: store cable state and return
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+ *
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+ * This function check the cable state either attached or detached,
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+ * and then divide precise type of cable according to cable group.
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+ * - max14577_CABLE_GROUP_ADC
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+ * - max14577_CABLE_GROUP_CHG
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+ */
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+static int max14577_muic_get_cable_type(struct max14577_muic_info *info,
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+ enum max14577_muic_cable_group group, bool *attached)
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+{
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+ int cable_type = 0;
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+ int adc;
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+ int chg_type;
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+
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+ switch (group) {
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+ case MAX14577_CABLE_GROUP_ADC:
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+ /*
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+ * Read ADC value to check cable type and decide cable state
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+ * according to cable type
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+ */
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+ adc = info->status[MAX14577_MUIC_STATUS1] & STATUS1_ADC_MASK;
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+ adc >>= STATUS1_ADC_SHIFT;
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+
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+ /*
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+ * Check current cable state/cable type and store cable type
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+ * (info->prev_cable_type) for handling cable when cable is
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+ * detached.
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+ */
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+ if (adc == MAX14577_MUIC_ADC_OPEN) {
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+ *attached = false;
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+
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+ cable_type = info->prev_cable_type;
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+ info->prev_cable_type = MAX14577_MUIC_ADC_OPEN;
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+ } else {
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+ *attached = true;
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+
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+ cable_type = info->prev_cable_type = adc;
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+ }
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+ break;
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+ case MAX14577_CABLE_GROUP_CHG:
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+ /*
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+ * Read charger type to check cable type and decide cable state
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+ * according to type of charger cable.
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+ */
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+ chg_type = info->status[MAX14577_MUIC_STATUS2] &
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+ STATUS2_CHGTYP_MASK;
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+ chg_type >>= STATUS2_CHGTYP_SHIFT;
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+
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+ if (chg_type == MAX14577_CHARGER_TYPE_NONE) {
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+ *attached = false;
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+
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+ cable_type = info->prev_chg_type;
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+ info->prev_chg_type = MAX14577_CHARGER_TYPE_NONE;
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+ } else {
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+ *attached = true;
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+
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+ /*
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+ * Check current cable state/cable type and store cable
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+ * type(info->prev_chg_type) for handling cable when
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+ * charger cable is detached.
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+ */
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+ cable_type = info->prev_chg_type = chg_type;
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+ }
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+
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+ break;
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+ default:
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+ dev_err(info->dev, "Unknown cable group (%d)\n", group);
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+ cable_type = -EINVAL;
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+ break;
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+ }
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+
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+ return cable_type;
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+}
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+
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+static int max14577_muic_jig_handler(struct max14577_muic_info *info,
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+ int cable_type, bool attached)
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+{
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+ char cable_name[32];
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+ int ret = 0;
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+ u8 path = CTRL1_SW_OPEN;
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+
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+ dev_dbg(info->dev,
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+ "external connector is %s (adc:0x%02x)\n",
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+ attached ? "attached" : "detached", cable_type);
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+
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+ switch (cable_type) {
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+ case MAX14577_MUIC_ADC_FACTORY_MODE_USB_OFF: /* ADC_JIG_USB_OFF */
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+ /* PATH:AP_USB */
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+ strcpy(cable_name, "JIG-USB-OFF");
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+ path = CTRL1_SW_USB;
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+ break;
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+ case MAX14577_MUIC_ADC_FACTORY_MODE_USB_ON: /* ADC_JIG_USB_ON */
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+ /* PATH:AP_USB */
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+ strcpy(cable_name, "JIG-USB-ON");
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+ path = CTRL1_SW_USB;
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+ break;
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+ case MAX14577_MUIC_ADC_FACTORY_MODE_UART_OFF: /* ADC_JIG_UART_OFF */
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+ /* PATH:AP_UART */
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+ strcpy(cable_name, "JIG-UART-OFF");
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+ path = CTRL1_SW_UART;
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+ break;
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+ default:
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+ dev_err(info->dev, "failed to detect %s jig cable\n",
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+ attached ? "attached" : "detached");
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+ return -EINVAL;
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+ }
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+
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+ ret = max14577_muic_set_path(info, path, attached);
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+ if (ret < 0)
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+ return ret;
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+
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+ extcon_set_cable_state(info->edev, cable_name, attached);
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+
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+ return 0;
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+}
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+
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+static int max14577_muic_adc_handler(struct max14577_muic_info *info)
|
|
|
+{
|
|
|
+ int cable_type;
|
|
|
+ bool attached;
|
|
|
+ int ret = 0;
|
|
|
+
|
|
|
+ /* Check accessory state which is either detached or attached */
|
|
|
+ cable_type = max14577_muic_get_cable_type(info,
|
|
|
+ MAX14577_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 MAX14577_MUIC_ADC_FACTORY_MODE_USB_OFF:
|
|
|
+ case MAX14577_MUIC_ADC_FACTORY_MODE_USB_ON:
|
|
|
+ case MAX14577_MUIC_ADC_FACTORY_MODE_UART_OFF:
|
|
|
+ /* JIG */
|
|
|
+ ret = max14577_muic_jig_handler(info, cable_type, attached);
|
|
|
+ if (ret < 0)
|
|
|
+ return ret;
|
|
|
+ break;
|
|
|
+ case MAX14577_MUIC_ADC_GROUND:
|
|
|
+ case MAX14577_MUIC_ADC_SEND_END_BUTTON:
|
|
|
+ case MAX14577_MUIC_ADC_REMOTE_S1_BUTTON:
|
|
|
+ case MAX14577_MUIC_ADC_REMOTE_S2_BUTTON:
|
|
|
+ case MAX14577_MUIC_ADC_REMOTE_S3_BUTTON:
|
|
|
+ case MAX14577_MUIC_ADC_REMOTE_S4_BUTTON:
|
|
|
+ case MAX14577_MUIC_ADC_REMOTE_S5_BUTTON:
|
|
|
+ case MAX14577_MUIC_ADC_REMOTE_S6_BUTTON:
|
|
|
+ case MAX14577_MUIC_ADC_REMOTE_S7_BUTTON:
|
|
|
+ case MAX14577_MUIC_ADC_REMOTE_S8_BUTTON:
|
|
|
+ case MAX14577_MUIC_ADC_REMOTE_S9_BUTTON:
|
|
|
+ case MAX14577_MUIC_ADC_REMOTE_S10_BUTTON:
|
|
|
+ case MAX14577_MUIC_ADC_REMOTE_S11_BUTTON:
|
|
|
+ case MAX14577_MUIC_ADC_REMOTE_S12_BUTTON:
|
|
|
+ case MAX14577_MUIC_ADC_RESERVED_ACC_1:
|
|
|
+ case MAX14577_MUIC_ADC_RESERVED_ACC_2:
|
|
|
+ case MAX14577_MUIC_ADC_RESERVED_ACC_3:
|
|
|
+ case MAX14577_MUIC_ADC_RESERVED_ACC_4:
|
|
|
+ case MAX14577_MUIC_ADC_RESERVED_ACC_5:
|
|
|
+ case MAX14577_MUIC_ADC_AUDIO_DEVICE_TYPE2:
|
|
|
+ case MAX14577_MUIC_ADC_PHONE_POWERED_DEV:
|
|
|
+ case MAX14577_MUIC_ADC_TTY_CONVERTER:
|
|
|
+ case MAX14577_MUIC_ADC_UART_CABLE:
|
|
|
+ case MAX14577_MUIC_ADC_CEA936A_TYPE1_CHG:
|
|
|
+ case MAX14577_MUIC_ADC_AV_CABLE_NOLOAD:
|
|
|
+ case MAX14577_MUIC_ADC_CEA936A_TYPE2_CHG:
|
|
|
+ case MAX14577_MUIC_ADC_FACTORY_MODE_UART_ON:
|
|
|
+ case MAX14577_MUIC_ADC_AUDIO_DEVICE_TYPE1:
|
|
|
+ /*
|
|
|
+ * This accessory isn't used in general case if it is specially
|
|
|
+ * needed to detect additional accessory, should implement
|
|
|
+ * proper operation when this accessory is attached/detached.
|
|
|
+ */
|
|
|
+ dev_info(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 max14577_muic_chg_handler(struct max14577_muic_info *info)
|
|
|
+{
|
|
|
+ int chg_type;
|
|
|
+ bool attached;
|
|
|
+ int ret = 0;
|
|
|
+
|
|
|
+ chg_type = max14577_muic_get_cable_type(info,
|
|
|
+ MAX14577_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 MAX14577_CHARGER_TYPE_USB:
|
|
|
+ /* PATH:AP_USB */
|
|
|
+ ret = max14577_muic_set_path(info, info->path_usb, attached);
|
|
|
+ if (ret < 0)
|
|
|
+ return ret;
|
|
|
+
|
|
|
+ extcon_set_cable_state(info->edev, "USB", attached);
|
|
|
+ break;
|
|
|
+ case MAX14577_CHARGER_TYPE_DEDICATED_CHG:
|
|
|
+ extcon_set_cable_state(info->edev, "TA", attached);
|
|
|
+ break;
|
|
|
+ case MAX14577_CHARGER_TYPE_DOWNSTREAM_PORT:
|
|
|
+ extcon_set_cable_state(info->edev,
|
|
|
+ "Charge-downstream", attached);
|
|
|
+ break;
|
|
|
+ case MAX14577_CHARGER_TYPE_SPECIAL_500MA:
|
|
|
+ extcon_set_cable_state(info->edev, "Slow-charger", attached);
|
|
|
+ break;
|
|
|
+ case MAX14577_CHARGER_TYPE_SPECIAL_1A:
|
|
|
+ extcon_set_cable_state(info->edev, "Fast-charger", attached);
|
|
|
+ break;
|
|
|
+ case MAX14577_CHARGER_TYPE_NONE:
|
|
|
+ case MAX14577_CHARGER_TYPE_DEAD_BATTERY:
|
|
|
+ break;
|
|
|
+ default:
|
|
|
+ dev_err(info->dev,
|
|
|
+ "failed to detect %s accessory (chg_type:0x%x)\n",
|
|
|
+ attached ? "attached" : "detached", chg_type);
|
|
|
+ return -EINVAL;
|
|
|
+ }
|
|
|
+
|
|
|
+ return 0;
|
|
|
+}
|
|
|
+
|
|
|
+static void max14577_muic_irq_work(struct work_struct *work)
|
|
|
+{
|
|
|
+ struct max14577_muic_info *info = container_of(work,
|
|
|
+ struct max14577_muic_info, irq_work);
|
|
|
+ int ret = 0;
|
|
|
+
|
|
|
+ if (!info->edev)
|
|
|
+ return;
|
|
|
+
|
|
|
+ mutex_lock(&info->mutex);
|
|
|
+
|
|
|
+ ret = max14577_bulk_read(info->max14577->regmap,
|
|
|
+ MAX14577_MUIC_REG_STATUS1, info->status, 2);
|
|
|
+ if (ret) {
|
|
|
+ dev_err(info->dev, "failed to read MUIC register\n");
|
|
|
+ mutex_unlock(&info->mutex);
|
|
|
+ return;
|
|
|
+ }
|
|
|
+
|
|
|
+ if (info->irq_adc) {
|
|
|
+ ret = max14577_muic_adc_handler(info);
|
|
|
+ info->irq_adc = false;
|
|
|
+ }
|
|
|
+ if (info->irq_chg) {
|
|
|
+ ret = max14577_muic_chg_handler(info);
|
|
|
+ info->irq_chg = false;
|
|
|
+ }
|
|
|
+
|
|
|
+ if (ret < 0)
|
|
|
+ dev_err(info->dev, "failed to handle MUIC interrupt\n");
|
|
|
+
|
|
|
+ mutex_unlock(&info->mutex);
|
|
|
+
|
|
|
+ return;
|
|
|
+}
|
|
|
+
|
|
|
+static irqreturn_t max14577_muic_irq_handler(int irq, void *data)
|
|
|
+{
|
|
|
+ struct max14577_muic_info *info = data;
|
|
|
+ int i, irq_type = -1;
|
|
|
+
|
|
|
+ /*
|
|
|
+ * We may be called multiple times for different nested IRQ-s.
|
|
|
+ * Including changes in INT1_ADC and INT2_CGHTYP at once.
|
|
|
+ * However we only need to know whether it was ADC, charger
|
|
|
+ * or both interrupts so decode IRQ and turn on proper flags.
|
|
|
+ */
|
|
|
+ for (i = 0; i < ARRAY_SIZE(muic_irqs); i++)
|
|
|
+ if (irq == muic_irqs[i].virq)
|
|
|
+ irq_type = muic_irqs[i].irq;
|
|
|
+
|
|
|
+ switch (irq_type) {
|
|
|
+ case MAX14577_IRQ_INT1_ADC:
|
|
|
+ case MAX14577_IRQ_INT1_ADCLOW:
|
|
|
+ case MAX14577_IRQ_INT1_ADCERR:
|
|
|
+ /* Handle all of accessory except for
|
|
|
+ type of charger accessory */
|
|
|
+ info->irq_adc = true;
|
|
|
+ break;
|
|
|
+ case MAX14577_IRQ_INT2_CHGTYP:
|
|
|
+ case MAX14577_IRQ_INT2_CHGDETRUN:
|
|
|
+ case MAX14577_IRQ_INT2_DCDTMR:
|
|
|
+ case MAX14577_IRQ_INT2_DBCHG:
|
|
|
+ case MAX14577_IRQ_INT2_VBVOLT:
|
|
|
+ /* Handle charger accessory */
|
|
|
+ info->irq_chg = true;
|
|
|
+ break;
|
|
|
+ default:
|
|
|
+ dev_err(info->dev, "muic interrupt: irq %d occurred, skipped\n",
|
|
|
+ irq_type);
|
|
|
+ return IRQ_HANDLED;
|
|
|
+ }
|
|
|
+ schedule_work(&info->irq_work);
|
|
|
+
|
|
|
+ return IRQ_HANDLED;
|
|
|
+}
|
|
|
+
|
|
|
+static int max14577_muic_detect_accessory(struct max14577_muic_info *info)
|
|
|
+{
|
|
|
+ int ret = 0;
|
|
|
+ int adc;
|
|
|
+ int chg_type;
|
|
|
+ bool attached;
|
|
|
+
|
|
|
+ mutex_lock(&info->mutex);
|
|
|
+
|
|
|
+ /* Read STATUSx register to detect accessory */
|
|
|
+ ret = max14577_bulk_read(info->max14577->regmap,
|
|
|
+ MAX14577_MUIC_REG_STATUS1, info->status, 2);
|
|
|
+ if (ret) {
|
|
|
+ dev_err(info->dev, "failed to read MUIC register\n");
|
|
|
+ mutex_unlock(&info->mutex);
|
|
|
+ return ret;
|
|
|
+ }
|
|
|
+
|
|
|
+ adc = max14577_muic_get_cable_type(info, MAX14577_CABLE_GROUP_ADC,
|
|
|
+ &attached);
|
|
|
+ if (attached && adc != MAX14577_MUIC_ADC_OPEN) {
|
|
|
+ ret = max14577_muic_adc_handler(info);
|
|
|
+ if (ret < 0) {
|
|
|
+ dev_err(info->dev, "Cannot detect accessory\n");
|
|
|
+ mutex_unlock(&info->mutex);
|
|
|
+ return ret;
|
|
|
+ }
|
|
|
+ }
|
|
|
+
|
|
|
+ chg_type = max14577_muic_get_cable_type(info, MAX14577_CABLE_GROUP_CHG,
|
|
|
+ &attached);
|
|
|
+ if (attached && chg_type != MAX14577_CHARGER_TYPE_NONE) {
|
|
|
+ ret = max14577_muic_chg_handler(info);
|
|
|
+ if (ret < 0) {
|
|
|
+ dev_err(info->dev, "Cannot detect charger accessory\n");
|
|
|
+ mutex_unlock(&info->mutex);
|
|
|
+ return ret;
|
|
|
+ }
|
|
|
+ }
|
|
|
+
|
|
|
+ mutex_unlock(&info->mutex);
|
|
|
+
|
|
|
+ return 0;
|
|
|
+}
|
|
|
+
|
|
|
+static void max14577_muic_detect_cable_wq(struct work_struct *work)
|
|
|
+{
|
|
|
+ struct max14577_muic_info *info = container_of(to_delayed_work(work),
|
|
|
+ struct max14577_muic_info, wq_detcable);
|
|
|
+
|
|
|
+ max14577_muic_detect_accessory(info);
|
|
|
+}
|
|
|
+
|
|
|
+static int max14577_muic_probe(struct platform_device *pdev)
|
|
|
+{
|
|
|
+ struct max14577 *max14577 = dev_get_drvdata(pdev->dev.parent);
|
|
|
+ struct max14577_muic_info *info;
|
|
|
+ int delay_jiffies;
|
|
|
+ int ret;
|
|
|
+ int i;
|
|
|
+ u8 id;
|
|
|
+
|
|
|
+ info = devm_kzalloc(&pdev->dev, sizeof(*info), GFP_KERNEL);
|
|
|
+ if (!info) {
|
|
|
+ dev_err(&pdev->dev, "failed to allocate memory\n");
|
|
|
+ return -ENOMEM;
|
|
|
+ }
|
|
|
+ info->dev = &pdev->dev;
|
|
|
+ info->max14577 = max14577;
|
|
|
+
|
|
|
+ platform_set_drvdata(pdev, info);
|
|
|
+ mutex_init(&info->mutex);
|
|
|
+
|
|
|
+ INIT_WORK(&info->irq_work, max14577_muic_irq_work);
|
|
|
+
|
|
|
+ /* Support irq domain for max14577 MUIC device */
|
|
|
+ for (i = 0; i < ARRAY_SIZE(muic_irqs); i++) {
|
|
|
+ struct max14577_muic_irq *muic_irq = &muic_irqs[i];
|
|
|
+ unsigned int virq = 0;
|
|
|
+
|
|
|
+ virq = regmap_irq_get_virq(max14577->irq_data, muic_irq->irq);
|
|
|
+ if (!virq)
|
|
|
+ return -EINVAL;
|
|
|
+ muic_irq->virq = virq;
|
|
|
+
|
|
|
+ ret = devm_request_threaded_irq(&pdev->dev, virq, NULL,
|
|
|
+ max14577_muic_irq_handler,
|
|
|
+ IRQF_NO_SUSPEND,
|
|
|
+ muic_irq->name, info);
|
|
|
+ if (ret) {
|
|
|
+ dev_err(&pdev->dev,
|
|
|
+ "failed: irq request (IRQ: %d,"
|
|
|
+ " error :%d)\n",
|
|
|
+ muic_irq->irq, ret);
|
|
|
+ return ret;
|
|
|
+ }
|
|
|
+ }
|
|
|
+
|
|
|
+ /* Initialize extcon device */
|
|
|
+ info->edev = devm_kzalloc(&pdev->dev, sizeof(*info->edev), GFP_KERNEL);
|
|
|
+ if (!info->edev) {
|
|
|
+ dev_err(&pdev->dev, "failed to allocate memory for extcon\n");
|
|
|
+ return -ENOMEM;
|
|
|
+ }
|
|
|
+ info->edev->name = DEV_NAME;
|
|
|
+ info->edev->supported_cable = max14577_extcon_cable;
|
|
|
+ ret = extcon_dev_register(info->edev);
|
|
|
+ if (ret) {
|
|
|
+ dev_err(&pdev->dev, "failed to register extcon device\n");
|
|
|
+ return ret;
|
|
|
+ }
|
|
|
+
|
|
|
+ /* Default h/w line path */
|
|
|
+ info->path_usb = CTRL1_SW_USB;
|
|
|
+ info->path_uart = CTRL1_SW_UART;
|
|
|
+ delay_jiffies = msecs_to_jiffies(DELAY_MS_DEFAULT);
|
|
|
+
|
|
|
+ /* Set initial path for UART */
|
|
|
+ max14577_muic_set_path(info, info->path_uart, true);
|
|
|
+
|
|
|
+ /* Check revision number of MUIC device*/
|
|
|
+ ret = max14577_read_reg(info->max14577->regmap,
|
|
|
+ MAX14577_REG_DEVICEID, &id);
|
|
|
+ if (ret < 0) {
|
|
|
+ dev_err(&pdev->dev, "failed to read revision number\n");
|
|
|
+ goto err_extcon;
|
|
|
+ }
|
|
|
+ dev_info(info->dev, "device ID : 0x%x\n", id);
|
|
|
+
|
|
|
+ /* Set ADC debounce time */
|
|
|
+ max14577_muic_set_debounce_time(info, ADC_DEBOUNCE_TIME_25MS);
|
|
|
+
|
|
|
+ /*
|
|
|
+ * 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, max14577_muic_detect_cable_wq);
|
|
|
+ ret = queue_delayed_work(system_power_efficient_wq, &info->wq_detcable,
|
|
|
+ delay_jiffies);
|
|
|
+ if (ret < 0) {
|
|
|
+ dev_err(&pdev->dev,
|
|
|
+ "failed to schedule delayed work for cable detect\n");
|
|
|
+ goto err_extcon;
|
|
|
+ }
|
|
|
+
|
|
|
+ return ret;
|
|
|
+
|
|
|
+err_extcon:
|
|
|
+ extcon_dev_unregister(info->edev);
|
|
|
+ return ret;
|
|
|
+}
|
|
|
+
|
|
|
+static int max14577_muic_remove(struct platform_device *pdev)
|
|
|
+{
|
|
|
+ struct max14577_muic_info *info = platform_get_drvdata(pdev);
|
|
|
+
|
|
|
+ cancel_work_sync(&info->irq_work);
|
|
|
+ extcon_dev_unregister(info->edev);
|
|
|
+
|
|
|
+ return 0;
|
|
|
+}
|
|
|
+
|
|
|
+static struct platform_driver max14577_muic_driver = {
|
|
|
+ .driver = {
|
|
|
+ .name = DEV_NAME,
|
|
|
+ .owner = THIS_MODULE,
|
|
|
+ },
|
|
|
+ .probe = max14577_muic_probe,
|
|
|
+ .remove = max14577_muic_remove,
|
|
|
+};
|
|
|
+
|
|
|
+module_platform_driver(max14577_muic_driver);
|
|
|
+
|
|
|
+MODULE_DESCRIPTION("MAXIM 14577 Extcon driver");
|
|
|
+MODULE_AUTHOR("Chanwoo Choi <cw00.choi@samsung.com>");
|
|
|
+MODULE_LICENSE("GPL");
|
|
|
+MODULE_ALIAS("platform:extcon-max14577");
|
Greg Kroah-Hartman