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Date: Tue, 17 Jul 2012 13:28:28 +0900
From: Chanwoo Choi <cw00.choi@...sung.com>
To: gregkh@...uxfoundation.org
Cc: myungjoo.ham@...sung.com, kyungmin.park@...sung.com,
linux-kernel@...r.kernel.org, Chanwoo Choi <cw00.choi@...sung.com>
Subject: [PATCH] extcon: MAX77693: Add extcon-max77693 driver to support Maxim
MAX77693 MUIC device
This patch support Maxim MAX77693 MUIC device by using EXTCON Subsystem
to handle various external connector. The extcon-max77693 use regmap
method for i2c communication and support irq domain instead of previous
method of irq base.
Signed-off-by: Chanwoo Choi <cw00.choi@...sung.com>
Signed-off-by: Myungjoo Ham <myungjoo.ham@...sung.com>
Signed-off-by: Kyungmin Park <kyungmin.park@...sung.com>
---
drivers/extcon/Kconfig | 10 +
drivers/extcon/Makefile | 1 +
drivers/extcon/extcon-max77693.c | 779 ++++++++++++++++++++++++++++++++++++++
3 files changed, 790 insertions(+), 0 deletions(-)
create mode 100644 drivers/extcon/extcon-max77693.c
diff --git a/drivers/extcon/Kconfig b/drivers/extcon/Kconfig
index bb385ac..1671635 100644
--- a/drivers/extcon/Kconfig
+++ b/drivers/extcon/Kconfig
@@ -21,6 +21,16 @@ config EXTCON_GPIO
Say Y here to enable GPIO based extcon support. Note that GPIO
extcon supports single state per extcon instance.
+config EXTCON_MAX77693
+ tristate "MAX77693 EXTCON Support"
+ depends on MFD_MAX77693
+ select IRQ_DOMAIN
+ select REGMAP_I2C
+ help
+ If you say yes here you get support for the MUIC device of
+ Maxim MAX77693 PMIC. The MAX77693 MUIC is a USB port accessory
+ detector and switch.
+
config EXTCON_MAX8997
tristate "MAX8997 EXTCON Support"
depends on MFD_MAX8997
diff --git a/drivers/extcon/Makefile b/drivers/extcon/Makefile
index e932caa..88961b3 100644
--- a/drivers/extcon/Makefile
+++ b/drivers/extcon/Makefile
@@ -4,5 +4,6 @@
obj-$(CONFIG_EXTCON) += extcon_class.o
obj-$(CONFIG_EXTCON_GPIO) += extcon_gpio.o
+obj-$(CONFIG_EXTCON_MAX77693) += extcon-max77693.o
obj-$(CONFIG_EXTCON_MAX8997) += extcon-max8997.o
obj-$(CONFIG_EXTCON_ARIZONA) += extcon-arizona.o
diff --git a/drivers/extcon/extcon-max77693.c b/drivers/extcon/extcon-max77693.c
new file mode 100644
index 0000000..920a609
--- /dev/null
+++ b/drivers/extcon/extcon-max77693.c
@@ -0,0 +1,779 @@
+/*
+ * extcon-max77693.c - MAX77693 extcon driver to support MAX77693 MUIC
+ *
+ * Copyright (C) 2012 Samsung Electrnoics
+ * Chanwoo Choi <cw00.choi@...sung.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.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ */
+
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/i2c.h>
+#include <linux/slab.h>
+#include <linux/interrupt.h>
+#include <linux/err.h>
+#include <linux/platform_device.h>
+#include <linux/mfd/max77693.h>
+#include <linux/mfd/max77693-private.h>
+#include <linux/extcon.h>
+#include <linux/regmap.h>
+#include <linux/irqdomain.h>
+
+#define DEV_NAME "max77693-muic"
+
+/* MAX77693 MUIC - STATUS1~3 Register */
+#define STATUS1_ADC_SHIFT (0)
+#define STATUS1_ADCLOW_SHIFT (5)
+#define STATUS1_ADCERR_SHIFT (6)
+#define STATUS1_ADC1K_SHIFT (7)
+#define STATUS1_ADC_MASK (0x1f << STATUS1_ADC_SHIFT)
+#define STATUS1_ADCLOW_MASK (0x1 << STATUS1_ADCLOW_SHIFT)
+#define STATUS1_ADCERR_MASK (0x1 << STATUS1_ADCERR_SHIFT)
+#define STATUS1_ADC1K_MASK (0x1 << STATUS1_ADC1K_SHIFT)
+
+#define STATUS2_CHGTYP_SHIFT (0)
+#define STATUS2_CHGDETRUN_SHIFT (3)
+#define STATUS2_DCDTMR_SHIFT (4)
+#define STATUS2_DXOVP_SHIFT (5)
+#define STATUS2_VBVOLT_SHIFT (6)
+#define STATUS2_VIDRM_SHIFT (7)
+#define STATUS2_CHGTYP_MASK (0x7 << STATUS2_CHGTYP_SHIFT)
+#define STATUS2_CHGDETRUN_MASK (0x1 << STATUS2_CHGDETRUN_SHIFT)
+#define STATUS2_DCDTMR_MASK (0x1 << STATUS2_DCDTMR_SHIFT)
+#define STATUS2_DXOVP_MASK (0x1 << STATUS2_DXOVP_SHIFT)
+#define STATUS2_VBVOLT_MASK (0x1 << STATUS2_VBVOLT_SHIFT)
+#define STATUS2_VIDRM_MASK (0x1 << STATUS2_VIDRM_SHIFT)
+
+#define STATUS3_OVP_SHIFT (2)
+#define STATUS3_OVP_MASK (0x1 << STATUS3_OVP_SHIFT)
+
+/* MAX77693 CDETCTRL1~2 register */
+#define CDETCTRL1_CHGDETEN_SHIFT (0)
+#define CDETCTRL1_CHGTYPMAN_SHIFT (1)
+#define CDETCTRL1_DCDEN_SHIFT (2)
+#define CDETCTRL1_DCD2SCT_SHIFT (3)
+#define CDETCTRL1_CDDELAY_SHIFT (4)
+#define CDETCTRL1_DCDCPL_SHIFT (5)
+#define CDETCTRL1_CDPDET_SHIFT (7)
+#define CDETCTRL1_CHGDETEN_MASK (0x1 << CDETCTRL1_CHGDETEN_SHIFT)
+#define CDETCTRL1_CHGTYPMAN_MASK (0x1 << CDETCTRL1_CHGTYPMAN_SHIFT)
+#define CDETCTRL1_DCDEN_MASK (0x1 << CDETCTRL1_DCDEN_SHIFT)
+#define CDETCTRL1_DCD2SCT_MASK (0x1 << CDETCTRL1_DCD2SCT_SHIFT)
+#define CDETCTRL1_CDDELAY_MASK (0x1 << CDETCTRL1_CDDELAY_SHIFT)
+#define CDETCTRL1_DCDCPL_MASK (0x1 << CDETCTRL1_DCDCPL_SHIFT)
+#define CDETCTRL1_CDPDET_MASK (0x1 << CDETCTRL1_CDPDET_SHIFT)
+
+#define CDETCTRL2_VIDRMEN_SHIFT (1)
+#define CDETCTRL2_DXOVPEN_SHIFT (3)
+#define CDETCTRL2_VIDRMEN_MASK (0x1 << CDETCTRL2_VIDRMEN_SHIFT)
+#define CDETCTRL2_DXOVPEN_MASK (0x1 << CDETCTRL2_DXOVPEN_SHIFT)
+
+/* MAX77693 MUIC - CONTROL1~3 register */
+#define COMN1SW_SHIFT (0)
+#define COMP2SW_SHIFT (3)
+#define COMN1SW_MASK (0x7 << COMN1SW_SHIFT)
+#define COMP2SW_MASK (0x7 << COMP2SW_SHIFT)
+#define COMP_SW_MASK (COMP2SW_MASK | COMN1SW_MASK)
+#define CONTROL1_SW_USB ((1 << COMP2SW_SHIFT) \
+ | (1 << COMN1SW_SHIFT))
+#define CONTROL1_SW_AUDIO ((2 << COMP2SW_SHIFT) \
+ | (2 << COMN1SW_SHIFT))
+#define CONTROL1_SW_UART ((3 << COMP2SW_SHIFT) \
+ | (3 << COMN1SW_SHIFT))
+#define CONTROL1_SW_OPEN ((0 << COMP2SW_SHIFT) \
+ | (0 << COMN1SW_SHIFT))
+
+#define CONTROL2_LOWPWR_SHIFT (0)
+#define CONTROL2_ADCEN_SHIFT (1)
+#define CONTROL2_CPEN_SHIFT (2)
+#define CONTROL2_SFOUTASRT_SHIFT (3)
+#define CONTROL2_SFOUTORD_SHIFT (4)
+#define CONTROL2_ACCDET_SHIFT (5)
+#define CONTROL2_USBCPINT_SHIFT (6)
+#define CONTROL2_RCPS_SHIFT (7)
+#define CONTROL2_LOWPWR_MASK (0x1 << CONTROL2_LOWPWR_SHIFT)
+#define CONTROL2_ADCEN_MASK (0x1 << CONTROL2_ADCEN_SHIFT)
+#define CONTROL2_CPEN_MASK (0x1 << CONTROL2_CPEN_SHIFT)
+#define CONTROL2_SFOUTASRT_MASK (0x1 << CONTROL2_SFOUTASRT_SHIFT)
+#define CONTROL2_SFOUTORD_MASK (0x1 << CONTROL2_SFOUTORD_SHIFT)
+#define CONTROL2_ACCDET_MASK (0x1 << CONTROL2_ACCDET_SHIFT)
+#define CONTROL2_USBCPINT_MASK (0x1 << CONTROL2_USBCPINT_SHIFT)
+#define CONTROL2_RCPS_MASK (0x1 << CONTROL2_RCPS_SHIFT)
+
+#define CONTROL3_JIGSET_SHIFT (0)
+#define CONTROL3_BTLDSET_SHIFT (2)
+#define CONTROL3_ADCDBSET_SHIFT (4)
+#define CONTROL3_JIGSET_MASK (0x3 << CONTROL3_JIGSET_SHIFT)
+#define CONTROL3_BTLDSET_MASK (0x3 << CONTROL3_BTLDSET_SHIFT)
+#define CONTROL3_ADCDBSET_MASK (0x3 << CONTROL3_ADCDBSET_SHIFT)
+
+enum max77693_muic_adc_debounce_time {
+ ADC_DEBOUNCE_TIME_5MS = 0,
+ ADC_DEBOUNCE_TIME_10MS,
+ ADC_DEBOUNCE_TIME_25MS,
+ ADC_DEBOUNCE_TIME_38_62MS,
+};
+
+struct max77693_muic_info {
+ struct device *dev;
+ struct max77693_dev *max77693;
+ struct extcon_dev *edev;
+ int prev_adc;
+ int prev_adc_gnd;
+ int prev_chg_type;
+ u8 status[2];
+
+ int irq;
+ struct work_struct irq_work;
+ struct mutex mutex;
+};
+
+enum max77693_muic_charger_type {
+ MAX77693_CHARGER_TYPE_NONE = 0,
+ MAX77693_CHARGER_TYPE_USB,
+ MAX77693_CHARGER_TYPE_DOWNSTREAM_PORT,
+ MAX77693_CHARGER_TYPE_DEDICATED_CHG,
+ MAX77693_CHARGER_TYPE_APPLE_500MA,
+ MAX77693_CHARGER_TYPE_APPLE_1A_2A,
+ MAX77693_CHARGER_TYPE_DEAD_BATTERY = 7,
+};
+
+/**
+ * struct max77693_muic_irq
+ * @irq: the index of irq list of MUIC device.
+ * @name: the name of irq.
+ * @virq: the virtual irq to use irq domain
+ */
+struct max77693_muic_irq {
+ unsigned int irq;
+ const char *name;
+ unsigned int virq;
+};
+
+static struct max77693_muic_irq muic_irqs[] = {
+ { MAX77693_MUIC_IRQ_INT1_ADC, "muic-ADC" },
+ { MAX77693_MUIC_IRQ_INT1_ADC_LOW, "muic-ADCLOW" },
+ { MAX77693_MUIC_IRQ_INT1_ADC_ERR, "muic-ADCError" },
+ { MAX77693_MUIC_IRQ_INT1_ADC1K, "muic-ADC1K" },
+ { MAX77693_MUIC_IRQ_INT2_CHGTYP, "muic-CHGTYP" },
+ { MAX77693_MUIC_IRQ_INT2_CHGDETREUN, "muic-CHGDETREUN" },
+ { MAX77693_MUIC_IRQ_INT2_DCDTMR, "muic-DCDTMR" },
+ { MAX77693_MUIC_IRQ_INT2_DXOVP, "muic-DXOVP" },
+ { MAX77693_MUIC_IRQ_INT2_VBVOLT, "muic-VBVOLT" },
+ { MAX77693_MUIC_IRQ_INT2_VIDRM, "muic-VIDRM" },
+ { MAX77693_MUIC_IRQ_INT3_EOC, "muic-EOC" },
+ { MAX77693_MUIC_IRQ_INT3_CGMBC, "muic-CGMBC" },
+ { MAX77693_MUIC_IRQ_INT3_OVP, "muic-OVP" },
+ { MAX77693_MUIC_IRQ_INT3_MBCCHG_ERR, "muic-MBCCHG_ERR" },
+ { MAX77693_MUIC_IRQ_INT3_CHG_ENABLED, "muic-CHG_ENABLED" },
+ { MAX77693_MUIC_IRQ_INT3_BAT_DET, "muic-BAT_DET" },
+};
+
+/* Define supported accessory type */
+enum max77693_muic_acc_type {
+ MAX77693_MUIC_ADC_GROUND = 0x0,
+ MAX77693_MUIC_ADC_SEND_END_BUTTON,
+ MAX77693_MUIC_ADC_REMOTE_S1_BUTTON,
+ MAX77693_MUIC_ADC_REMOTE_S2_BUTTON,
+ MAX77693_MUIC_ADC_REMOTE_S3_BUTTON,
+ MAX77693_MUIC_ADC_REMOTE_S4_BUTTON,
+ MAX77693_MUIC_ADC_REMOTE_S5_BUTTON,
+ MAX77693_MUIC_ADC_REMOTE_S6_BUTTON,
+ MAX77693_MUIC_ADC_REMOTE_S7_BUTTON,
+ MAX77693_MUIC_ADC_REMOTE_S8_BUTTON,
+ MAX77693_MUIC_ADC_REMOTE_S9_BUTTON,
+ MAX77693_MUIC_ADC_REMOTE_S10_BUTTON,
+ MAX77693_MUIC_ADC_REMOTE_S11_BUTTON,
+ MAX77693_MUIC_ADC_REMOTE_S12_BUTTON,
+ MAX77693_MUIC_ADC_RESERVED_ACC_1,
+ MAX77693_MUIC_ADC_RESERVED_ACC_2,
+ MAX77693_MUIC_ADC_RESERVED_ACC_3,
+ MAX77693_MUIC_ADC_RESERVED_ACC_4,
+ MAX77693_MUIC_ADC_RESERVED_ACC_5,
+ MAX77693_MUIC_ADC_CEA936_AUDIO,
+ MAX77693_MUIC_ADC_PHONE_POWERED_DEV,
+ MAX77693_MUIC_ADC_TTY_CONVERTER,
+ MAX77693_MUIC_ADC_UART_CABLE,
+ MAX77693_MUIC_ADC_CEA936A_TYPE1_CHG,
+ MAX77693_MUIC_ADC_FACTORY_MODE_USB_OFF,
+ MAX77693_MUIC_ADC_FACTORY_MODE_USB_ON,
+ MAX77693_MUIC_ADC_AV_CABLE_NOLOAD,
+ MAX77693_MUIC_ADC_CEA936A_TYPE2_CHG,
+ MAX77693_MUIC_ADC_FACTORY_MODE_UART_OFF,
+ MAX77693_MUIC_ADC_FACTORY_MODE_UART_ON,
+ MAX77693_MUIC_ADC_AUDIO_MODE_REMOTE,
+ MAX77693_MUIC_ADC_OPEN,
+
+ /* The below accessories have same ADC value so ADCLow and
+ ADC1K bit is used to separate specific accessory */
+ MAX77693_MUIC_GND_USB_OTG = 0x100, /* ADC:0x0, ADCLow:0, ADC1K:0 */
+ MAX77693_MUIC_GND_AV_CABLE_LOAD = 0x102,/* ADC:0x0, ADCLow:1, ADC1K:0 */
+ MAX77693_MUIC_GND_MHL_CABLE = 0x103, /* ADC:0x0, ADCLow:1, ADC1K:1 */
+};
+
+/* MAX77693 MUIC device support below list of accessories(external connector) */
+const char *max77693_extcon_cable[] = {
+ [0] = "USB",
+ [1] = "USB-Host",
+ [2] = "TA",
+ [3] = "Fast-charger",
+ [4] = "Slow-charger",
+ [5] = "Charge-downstream",
+ [6] = "MHL",
+ [7] = "Audio-video-load",
+ [8] = "Audio-video-noload",
+ [9] = "JIG",
+
+ NULL,
+};
+
+static int max77693_muic_set_debounce_time(struct max77693_muic_info *info,
+ enum max77693_muic_adc_debounce_time time)
+{
+ int ret = 0;
+ u8 ctrl3;
+
+ switch (time) {
+ case ADC_DEBOUNCE_TIME_5MS:
+ case ADC_DEBOUNCE_TIME_10MS:
+ case ADC_DEBOUNCE_TIME_25MS:
+ case ADC_DEBOUNCE_TIME_38_62MS:
+ ret = max77693_read_reg(info->max77693->regmap_muic,
+ MAX77693_MUIC_REG_CTRL3, &ctrl3);
+ ctrl3 &= ~CONTROL3_ADCDBSET_MASK;
+ ctrl3 |= (time << CONTROL3_ADCDBSET_SHIFT);
+
+ ret = max77693_write_reg(info->max77693->regmap_muic,
+ MAX77693_MUIC_REG_CTRL3, ctrl3);
+ if (ret) {
+ dev_err(info->dev, "failed to set ADC debounce time\n");
+ ret = -EINVAL;
+ }
+ break;
+ default:
+ dev_err(info->dev, "invalid ADC debounce time\n");
+ ret = -EINVAL;
+ break;
+ }
+
+ return ret;
+};
+
+static int max77693_muic_set_path(struct max77693_muic_info *info,
+ u8 val, bool attached)
+{
+ int ret = 0;
+ u8 ctrl1, ctrl2 = 0;
+
+ if (attached)
+ ctrl1 = val;
+ else
+ ctrl1 = CONTROL1_SW_OPEN;
+
+ ret = max77693_update_reg(info->max77693->regmap_muic,
+ MAX77693_MUIC_REG_CTRL1, ctrl1, COMP_SW_MASK);
+ if (ret < 0) {
+ dev_err(info->dev, "failed to update MUIC register\n");
+ goto out;
+ }
+
+ if (attached)
+ ctrl2 |= CONTROL2_CPEN_MASK; /* LowPwr=0, CPEn=1 */
+ else
+ ctrl2 |= CONTROL2_LOWPWR_MASK; /* LowPwr=1, CPEn=0 */
+
+ ret = max77693_update_reg(info->max77693->regmap_muic,
+ MAX77693_MUIC_REG_CTRL2, ctrl2,
+ CONTROL2_LOWPWR_MASK | CONTROL2_CPEN_MASK);
+ if (ret < 0) {
+ dev_err(info->dev, "failed to update MUIC register\n");
+ goto out;
+ }
+
+ dev_info(info->dev,
+ "CONTROL1 : 0x%02x, CONTROL2 : 0x%02x, state : %s\n",
+ ctrl1, ctrl2, attached ? "attached" : "detached");
+out:
+ return ret;
+}
+
+static int max77693_muic_adc_ground_handler(struct max77693_muic_info *info,
+ bool attached)
+{
+ int ret = 0;
+ int type;
+ int adc, adc1k, adclow;
+
+ if (attached) {
+ adc = info->status[0] & STATUS1_ADC_MASK;
+ adclow = info->status[0] & STATUS1_ADCLOW_MASK;
+ adclow >>= STATUS1_ADCLOW_SHIFT;
+ adc1k = info->status[0] & STATUS1_ADC1K_MASK;
+ adc1k >>= STATUS1_ADC1K_SHIFT;
+
+ /**
+ * [0x1][ADCLow][ADC1K]
+ * [0x1 0 0 ] : USB_OTG
+ * [0x1 1 0 ] : Audio Video Cable with load
+ * [0x1 1 1 ] : MHL
+ */
+ type = ((0x1 << 8) | (adclow << 1) | adc1k);
+
+ /* Store previous ADC value to handle accessory
+ when accessory will be detached */
+ info->prev_adc = adc;
+ info->prev_adc_gnd = type;
+ } else
+ type = info->prev_adc_gnd;
+
+ switch (type) {
+ case MAX77693_MUIC_GND_USB_OTG:
+ /* USB_OTG */
+ ret = max77693_muic_set_path(info, CONTROL1_SW_USB, attached);
+ if (ret < 0)
+ goto out;
+ extcon_set_cable_state(info->edev, "USB-Host", attached);
+ break;
+ case MAX77693_MUIC_GND_AV_CABLE_LOAD:
+ /* Audio Video Cable with load */
+ ret = max77693_muic_set_path(info, CONTROL1_SW_AUDIO, attached);
+ if (ret < 0)
+ goto out;
+ extcon_set_cable_state(info->edev,
+ "Audio-video-load", attached);
+ break;
+ case MAX77693_MUIC_GND_MHL_CABLE:
+ /* MHL */
+ extcon_set_cable_state(info->edev, "MHL", attached);
+ break;
+ default:
+ dev_err(info->dev, "faild to detect %s accessory\n",
+ attached ? "attached" : "detached");
+ dev_err(info->dev, "- adc:0x%x, adclow:0x%x, adc1k:0x%x\n",
+ adc, adclow, adc1k);
+ ret = -EINVAL;
+ break;
+ }
+
+out:
+ return ret;
+}
+
+static int max77693_muic_adc_handler(struct max77693_muic_info *info,
+ int curr_adc, bool attached)
+{
+ int ret = 0;
+ int adc;
+
+ if (attached) {
+ /* Store ADC value to handle accessory
+ when accessory will be detached */
+ info->prev_adc = curr_adc;
+ adc = curr_adc;
+ } else
+ adc = info->prev_adc;
+
+ dev_info(info->dev,
+ "external connector is %s (adc:0x%02x, prev_adc:0x%x)\n",
+ attached ? "attached" : "detached", curr_adc, info->prev_adc);
+
+ switch (adc) {
+ case MAX77693_MUIC_ADC_GROUND:
+ /* USB_OTG/MHL/Audio */
+ max77693_muic_adc_ground_handler(info, attached);
+ break;
+ case MAX77693_MUIC_ADC_FACTORY_MODE_USB_OFF:
+ case MAX77693_MUIC_ADC_FACTORY_MODE_USB_ON:
+ /* USB */
+ ret = max77693_muic_set_path(info, CONTROL1_SW_USB, attached);
+ if (ret < 0)
+ goto out;
+ extcon_set_cable_state(info->edev, "USB", attached);
+ break;
+ case MAX77693_MUIC_ADC_FACTORY_MODE_UART_OFF:
+ case MAX77693_MUIC_ADC_FACTORY_MODE_UART_ON:
+ /* JIG */
+ ret = max77693_muic_set_path(info, CONTROL1_SW_UART, attached);
+ if (ret < 0)
+ goto out;
+ extcon_set_cable_state(info->edev, "JIG", attached);
+ break;
+ case MAX77693_MUIC_ADC_AUDIO_MODE_REMOTE:
+ /* Audio Video cable with no-load */
+ ret = max77693_muic_set_path(info, CONTROL1_SW_AUDIO, attached);
+ if (ret < 0)
+ goto out;
+ extcon_set_cable_state(info->edev,
+ "Audio-video-noload", attached);
+ break;
+ case MAX77693_MUIC_ADC_SEND_END_BUTTON:
+ case MAX77693_MUIC_ADC_REMOTE_S1_BUTTON:
+ case MAX77693_MUIC_ADC_REMOTE_S2_BUTTON:
+ case MAX77693_MUIC_ADC_REMOTE_S3_BUTTON:
+ case MAX77693_MUIC_ADC_REMOTE_S4_BUTTON:
+ case MAX77693_MUIC_ADC_REMOTE_S5_BUTTON:
+ case MAX77693_MUIC_ADC_REMOTE_S6_BUTTON:
+ case MAX77693_MUIC_ADC_REMOTE_S7_BUTTON:
+ case MAX77693_MUIC_ADC_REMOTE_S8_BUTTON:
+ case MAX77693_MUIC_ADC_REMOTE_S9_BUTTON:
+ case MAX77693_MUIC_ADC_REMOTE_S10_BUTTON:
+ case MAX77693_MUIC_ADC_REMOTE_S11_BUTTON:
+ case MAX77693_MUIC_ADC_REMOTE_S12_BUTTON:
+ case MAX77693_MUIC_ADC_RESERVED_ACC_1:
+ case MAX77693_MUIC_ADC_RESERVED_ACC_2:
+ case MAX77693_MUIC_ADC_RESERVED_ACC_3:
+ case MAX77693_MUIC_ADC_RESERVED_ACC_4:
+ case MAX77693_MUIC_ADC_RESERVED_ACC_5:
+ case MAX77693_MUIC_ADC_CEA936_AUDIO:
+ case MAX77693_MUIC_ADC_PHONE_POWERED_DEV:
+ case MAX77693_MUIC_ADC_TTY_CONVERTER:
+ case MAX77693_MUIC_ADC_UART_CABLE:
+ case MAX77693_MUIC_ADC_CEA936A_TYPE1_CHG:
+ case MAX77693_MUIC_ADC_AV_CABLE_NOLOAD:
+ case MAX77693_MUIC_ADC_CEA936A_TYPE2_CHG:
+ /* 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", adc);
+ goto out;
+ default:
+ dev_err(info->dev,
+ "failed to detect %s accessory (adc:0x%x)\n",
+ attached ? "attached" : "detached", adc);
+ ret = -EINVAL;
+ goto out;
+ }
+
+out:
+ return ret;
+}
+
+static int max77693_muic_chg_handler(struct max77693_muic_info *info,
+ int curr_chg_type, bool attached)
+{
+ int ret = 0;
+ int chg_type;
+
+ if (attached) {
+ /* Store previous charger type to control
+ when charger accessory will be detached */
+ info->prev_chg_type = curr_chg_type;
+ chg_type = curr_chg_type;
+ } else
+ chg_type = info->prev_chg_type;
+
+ dev_info(info->dev,
+ "external connector is %s(chg_type:0x%x, prev_chg_type:0x%x)\n",
+ attached ? "attached" : "detached",
+ curr_chg_type, info->prev_chg_type);
+
+ switch (chg_type) {
+ case MAX77693_CHARGER_TYPE_USB:
+ ret = max77693_muic_set_path(info, CONTROL1_SW_USB, attached);
+ if (ret < 0)
+ goto out;
+ extcon_set_cable_state(info->edev, "USB", attached);
+ break;
+ case MAX77693_CHARGER_TYPE_DOWNSTREAM_PORT:
+ extcon_set_cable_state(info->edev,
+ "Charge-downstream", attached);
+ break;
+ case MAX77693_CHARGER_TYPE_DEDICATED_CHG:
+ extcon_set_cable_state(info->edev, "TA", attached);
+ break;
+ case MAX77693_CHARGER_TYPE_APPLE_500MA:
+ extcon_set_cable_state(info->edev, "Slow-charger", attached);
+ break;
+ case MAX77693_CHARGER_TYPE_APPLE_1A_2A:
+ extcon_set_cable_state(info->edev, "Fast-charger", attached);
+ break;
+ case MAX77693_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);
+ ret = -EINVAL;
+ goto out;
+ }
+
+out:
+ return ret;
+}
+
+static void max77693_muic_irq_work(struct work_struct *work)
+{
+ struct max77693_muic_info *info = container_of(work,
+ struct max77693_muic_info, irq_work);
+ int curr_adc, curr_chg_type;
+ int irq_type = -1;
+ int i, ret = 0;
+ bool attached = true;
+
+ if (!info->edev)
+ return;
+
+ mutex_lock(&info->mutex);
+
+ for (i = 0 ; i < ARRAY_SIZE(muic_irqs) ; i++)
+ if (info->irq == muic_irqs[i].virq)
+ irq_type = muic_irqs[i].irq;
+
+ ret = max77693_bulk_read(info->max77693->regmap_muic,
+ MAX77693_MUIC_REG_STATUS1, 2, info->status);
+ if (ret) {
+ dev_err(info->dev, "failed to read MUIC register\n");
+ mutex_unlock(&info->mutex);
+ return;
+ }
+
+ switch (irq_type) {
+ case MAX77693_MUIC_IRQ_INT1_ADC:
+ case MAX77693_MUIC_IRQ_INT1_ADC_LOW:
+ case MAX77693_MUIC_IRQ_INT1_ADC_ERR:
+ case MAX77693_MUIC_IRQ_INT1_ADC1K:
+ /* Handle all of accessory except for
+ type of charger accessory */
+ curr_adc = info->status[0] & STATUS1_ADC_MASK;
+ curr_adc >>= STATUS1_ADC_SHIFT;
+
+ /* Check accossory state which is either detached or attached */
+ if (curr_adc == MAX77693_MUIC_ADC_OPEN)
+ attached = false;
+
+ ret = max77693_muic_adc_handler(info, curr_adc, attached);
+ break;
+ case MAX77693_MUIC_IRQ_INT2_CHGTYP:
+ case MAX77693_MUIC_IRQ_INT2_CHGDETREUN:
+ case MAX77693_MUIC_IRQ_INT2_DCDTMR:
+ case MAX77693_MUIC_IRQ_INT2_DXOVP:
+ case MAX77693_MUIC_IRQ_INT2_VBVOLT:
+ case MAX77693_MUIC_IRQ_INT2_VIDRM:
+ /* Handle charger accessory */
+ curr_chg_type = info->status[1] & STATUS2_CHGTYP_MASK;
+ curr_chg_type >>= STATUS2_CHGTYP_SHIFT;
+
+ /* Check charger accossory state which
+ is either detached or attached */
+ if (curr_chg_type == MAX77693_CHARGER_TYPE_NONE)
+ attached = false;
+
+ ret = max77693_muic_chg_handler(info, curr_chg_type, attached);
+ break;
+ case MAX77693_MUIC_IRQ_INT3_EOC:
+ case MAX77693_MUIC_IRQ_INT3_CGMBC:
+ case MAX77693_MUIC_IRQ_INT3_OVP:
+ case MAX77693_MUIC_IRQ_INT3_MBCCHG_ERR:
+ case MAX77693_MUIC_IRQ_INT3_CHG_ENABLED:
+ case MAX77693_MUIC_IRQ_INT3_BAT_DET:
+ break;
+ default:
+ dev_err(info->dev, "muic interrupt: irq %d occurred\n",
+ irq_type);
+ break;
+ }
+
+ if (ret < 0)
+ dev_err(info->dev, "failed to handle MUIC interrupt\n");
+
+ mutex_unlock(&info->mutex);
+
+ return;
+}
+
+static irqreturn_t max77693_muic_irq_handler(int irq, void *data)
+{
+ struct max77693_muic_info *info = data;
+
+ info->irq = irq;
+ schedule_work(&info->irq_work);
+
+ return IRQ_HANDLED;
+}
+
+static struct regmap_config max77693_muic_regmap_config = {
+ .reg_bits = 8,
+ .val_bits = 8,
+};
+
+static int max77693_muic_detect_accessory(struct max77693_muic_info *info)
+{
+ int ret = 0;
+ int adc, chg_type;
+
+ mutex_lock(&info->mutex);
+
+ /* Read STATUSx register to detect accessory */
+ ret = max77693_bulk_read(info->max77693->regmap_muic,
+ MAX77693_MUIC_REG_STATUS1, 2, info->status);
+ if (ret) {
+ dev_err(info->dev, "failed to read MUIC register\n");
+ mutex_unlock(&info->mutex);
+ return -EINVAL;
+ }
+
+ adc = info->status[0] & STATUS1_ADC_MASK;
+ adc >>= STATUS1_ADC_SHIFT;
+
+ if (adc != MAX77693_MUIC_ADC_OPEN) {
+ dev_info(info->dev,
+ "external connector is attached (adc:0x%02x)\n", adc);
+
+ ret = max77693_muic_adc_handler(info, adc, true);
+ if (ret < 0)
+ dev_err(info->dev, "failed to detect accessory\n");
+ goto out;
+ }
+
+ chg_type = info->status[1] & STATUS2_CHGTYP_MASK;
+ chg_type >>= STATUS2_CHGTYP_SHIFT;
+
+ if (chg_type != MAX77693_CHARGER_TYPE_NONE) {
+ dev_info(info->dev,
+ "external connector is attached (chg_type:0x%x)\n",
+ chg_type);
+
+ max77693_muic_chg_handler(info, chg_type, true);
+ if (ret < 0)
+ dev_err(info->dev, "failed to detect charger accessory\n");
+ }
+
+out:
+ mutex_unlock(&info->mutex);
+ return ret;
+}
+
+static int __devinit max77693_muic_probe(struct platform_device *pdev)
+{
+ struct max77693_dev *max77693 = dev_get_drvdata(pdev->dev.parent);
+ struct max77693_muic_info *info;
+ int ret, i;
+ u8 id;
+
+ info = kzalloc(sizeof(struct max77693_muic_info), GFP_KERNEL);
+ if (!info) {
+ dev_err(&pdev->dev, "failed to allocate memory\n");
+ ret = -ENOMEM;
+ goto err_kfree;
+ }
+ info->dev = &pdev->dev;
+ info->max77693 = max77693;
+ info->max77693->regmap_muic = regmap_init_i2c(info->max77693->muic,
+ &max77693_muic_regmap_config);
+ if (IS_ERR(info->max77693->regmap_muic)) {
+ ret = PTR_ERR(info->max77693->regmap_muic);
+ dev_err(max77693->dev,
+ "failed to allocate register map: %d\n", ret);
+ goto err_regmap;
+ }
+ platform_set_drvdata(pdev, info);
+ mutex_init(&info->mutex);
+
+ INIT_WORK(&info->irq_work, max77693_muic_irq_work);
+
+ /* Support irq domain for MAX77693 MUIC device */
+ for (i = 0; i < ARRAY_SIZE(muic_irqs); i++) {
+ struct max77693_muic_irq *muic_irq = &muic_irqs[i];
+ int virq = 0;
+
+ virq = irq_create_mapping(max77693->irq_domain, muic_irq->irq);
+ if (!virq)
+ goto err_irq;
+ muic_irq->virq = virq;
+
+ ret = request_threaded_irq(virq, NULL,
+ max77693_muic_irq_handler,
+ 0, muic_irq->name, info);
+ if (ret) {
+ dev_err(&pdev->dev,
+ "failed: irq request (IRQ: %d,"
+ " error :%d)\n",
+ muic_irq->irq, ret);
+
+ for (i = i - 1; i >= 0; i--)
+ free_irq(muic_irq->virq, info);
+ goto err_irq;
+ }
+ }
+
+ /* Initialize extcon device */
+ info->edev = kzalloc(sizeof(struct extcon_dev), GFP_KERNEL);
+ if (!info->edev) {
+ dev_err(&pdev->dev, "failed to allocate memory for extcon\n");
+ ret = -ENOMEM;
+ goto err_irq;
+ }
+ info->edev->name = DEV_NAME;
+ info->edev->supported_cable = max77693_extcon_cable;
+ ret = extcon_dev_register(info->edev, NULL);
+ if (ret) {
+ dev_err(&pdev->dev, "failed to register extcon device\n");
+ goto err_extcon;
+ }
+
+ /* Check revision number of MUIC device*/
+ ret = max77693_read_reg(info->max77693->regmap_muic,
+ MAX77693_MUIC_REG_ID, &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 */
+ max77693_muic_set_debounce_time(info, ADC_DEBOUNCE_TIME_25MS);
+
+ /* Detect accessory on boot */
+ max77693_muic_detect_accessory(info);
+
+ return ret;
+
+err_extcon:
+ kfree(info->edev);
+err_irq:
+err_regmap:
+ kfree(info);
+err_kfree:
+ return ret;
+}
+
+static int __devexit max77693_muic_remove(struct platform_device *pdev)
+{
+ struct max77693_muic_info *info = platform_get_drvdata(pdev);
+ int i;
+
+ for (i = 0; i < ARRAY_SIZE(muic_irqs); i++)
+ free_irq(muic_irqs[i].virq, info);
+ cancel_work_sync(&info->irq_work);
+ extcon_dev_unregister(info->edev);
+ kfree(info);
+
+ return 0;
+}
+
+static struct platform_driver max77693_muic_driver = {
+ .driver = {
+ .name = DEV_NAME,
+ .owner = THIS_MODULE,
+ },
+ .probe = max77693_muic_probe,
+ .remove = __devexit_p(max77693_muic_remove),
+};
+
+module_platform_driver(max77693_muic_driver);
+
+MODULE_DESCRIPTION("Maxim MAX77693 Extcon driver");
+MODULE_AUTHOR("Chanwoo Choi <cw00.choi@...sung.com>");
+MODULE_LICENSE("GPL");
+MODULE_ALIAS("platform:extcon-max77693");
--
1.7.0.4
--
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