From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753175AbbAWFDa (ORCPT ); Fri, 23 Jan 2015 00:03:30 -0500 Received: from mailout2.samsung.com ([203.254.224.25]:14407 "EHLO mailout2.samsung.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752395AbbAWFDT (ORCPT ); Fri, 23 Jan 2015 00:03:19 -0500 X-AuditID: cbfee691-f79b86d000004a5a-0f-54c1d606bc31 From: Jaewon Kim To: linux-kernel@vger.kernel.org, devicetree@vger.kernel.org, linux-pm@vger.kernel.org Cc: Inki Dae , Rob Herring , Pawel Moll , Mark Rutland , Ian Campbell , Kumar Gala , Lee Jones , Chanwoo Choi , Sebastian Reichel , Mark Brown , Beomho Seo , Jaewon Kim Subject: [PATCH 2/6] extcon: max77843: Add max77843 MUIC driver Date: Fri, 23 Jan 2015 14:02:43 +0900 Message-id: <1421989367-32721-3-git-send-email-jaewon02.kim@samsung.com> X-Mailer: git-send-email 1.7.9.5 In-reply-to: <1421989367-32721-1-git-send-email-jaewon02.kim@samsung.com> References: <1421989367-32721-1-git-send-email-jaewon02.kim@samsung.com> X-Brightmail-Tracker: H4sIAAAAAAAAA+NgFuphkeLIzCtJLcpLzFFi42JZI2JSoMt27WCIwd71ghanP21jt5j68Amb xfUvz1kt5h85x2rR/2Yhq8W5VysZLSbdn8BisaPhCKvF/a9HGS0u75rDZvG59wijxdLrF5ks Jkxfy2LRuvcIu8Xp3SUO/B5r5q1h9Ljc18vksXL5FzaPTas62TzuXNvD5tG3ZRWjx+dNcgHs UVw2Kak5mWWpRfp2CVwZn6dqFly9xlgxZ9tM9gbGG5sZuxg5OSQETCR2XFgGZYtJXLi3ng3E FhJYyiixaJ4gTM36w1+Zuhi5gOLTGSW6Fi9mhXDamCQ6PixkB6liE9CW+L4eJMHJISIQIfH8 40pmkCJmgYPMEh0XTwMVcXAIC9hLtMwMAalhEVCVePBnPtg2XgEPiTun37GClEgIKEjMmWQD EuYU8JR4t+cF1EEeEqsnnGQBGSkh8JJdon/6BVaIOQIS3yYfYoHolZXYdIAZ4mhJiYMrbrBM YBRewMiwilE0tSC5oDgpvchUrzgxt7g0L10vOT93EyMwkk7/ezZxB+P9A9aHGAU4GJV4eBu2 HAwRYk0sK67MPcRoCrRhIrOUaHI+MF7zSuINjc2MLExNTI2NzC3NlMR5daR/BgsJpCeWpGan phakFsUXleakFh9iZOLglGpgtPvC7q4oUnBCcJWegeVsHRf/Jfsm3kgQTapJ/ccirXDLqGUB k3pt0M/O3ReDjx1hCPS69q+NWVv5d8KcE48FW3+HyVTUPGlXqrP5+uI0678FLCyS2sYzysOq W79qGIbHP/jwXqZ40XQvpq64Qx1cPi02Xux2ZwSZ3Z4dXd+/x2W73a3I7LdKLMUZiYZazEXF iQA7krzGnwIAAA== X-Brightmail-Tracker: H4sIAAAAAAAAA+NgFrrOIsWRmVeSWpSXmKPExsVy+t9jQV22awdDDGauZbM4/Wkbu8XUh0/Y LK5/ec5qMf/IOVaL/jcLWS3OvVrJaDHp/gQWix0NR1gt7n89ymhxedccNovPvUcYLZZev8hk MWH6WhaL1r1H2C1O7y5x4PdYM28No8flvl4mj5XLv7B5bFrVyeZx59oeNo++LasYPT5vkgtg j2pgtMlITUxJLVJIzUvOT8nMS7dV8g6Od443NTMw1DW0tDBXUshLzE21VXLxCdB1y8wBOlxJ oSwxpxQoFJBYXKykb4dpQmiIm64FTGOErm9IEFyPkQEaSFjDmPF5qmbB1WuMFXO2zWRvYLyx mbGLkZNDQsBEYv3hr0wQtpjEhXvr2boYuTiEBKYzSnQtXswK4bQxSXR8WMgOUsUmoC3xfT1I gpNDRCBC4vnHlcwgRcwCB5klOi6eBiri4BAWsJdomRkCUsMioCrx4M98NhCbV8BD4s7pd6wg JRICChJzJtmAhDkFPCXe7XkBViIEVLJ6wkmWCYy8CxgZVjGKphYkFxQnpeca6hUn5haX5qXr JefnbmIER+ozqR2MKxssDjEKcDAq8fA2bDkYIsSaWFZcmXuIUYKDWUmE98kBoBBvSmJlVWpR fnxRaU5q8SFGU6CjJjJLiSbnA5NIXkm8obGJmZGlkbmhhZGxuZI4r5J9W4iQQHpiSWp2ampB ahFMHxMHp1QDo+SjHT33dJcIv140Vfia/4Grvc8nen3vZr3gcVPogsHNFb7NOSfNXTKk6/I7 QuLDzz3LXbO3Vfde46r/jIJzW9ZMSXqrIDx1WU+eQfCZ7FbvsKMfpvnpVv42izDO53T5J30j iCHVVCK8YrFg69eFwZs2uKddnJSxrGa21PP/VafMb5ycdTS1XImlOCPRUIu5qDgRAMok46Lq AgAA DLP-Filter: Pass X-MTR: 20000000000000000@CPGS X-CFilter-Loop: Reflected Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org This patch adds MAX77843 extcon driver to support for MUIC(Micro USB Interface Controller) device by using EXTCON subsystem to handle various external connectors. Cc: Chanwoo Choi Signed-off-by: Jaewon Kim --- drivers/extcon/Kconfig | 10 + drivers/extcon/Makefile | 1 + drivers/extcon/extcon-max77843.c | 871 ++++++++++++++++++++++++++++++++++++++ 3 files changed, 882 insertions(+) create mode 100644 drivers/extcon/extcon-max77843.c diff --git a/drivers/extcon/Kconfig b/drivers/extcon/Kconfig index 6a1f7de..0b67538 100644 --- a/drivers/extcon/Kconfig +++ b/drivers/extcon/Kconfig @@ -55,6 +55,16 @@ config EXTCON_MAX77693 Maxim MAX77693 PMIC. The MAX77693 MUIC is a USB port accessory detector and switch. +config EXTCON_MAX77843 + tristate "MAX77843 EXTCON Support" + depends on MFD_MAX77843 + select IRQ_DOMAIN + select REGMAP_I2C + help + If you say yes here you get support for the MUIC device of + Maxim MAX77843. The MAX77843 MUIC is a USB port accessory + detector add switch. + config EXTCON_MAX8997 tristate "MAX8997 EXTCON Support" depends on MFD_MAX8997 && IRQ_DOMAIN diff --git a/drivers/extcon/Makefile b/drivers/extcon/Makefile index 0370b42..f21d5c4 100644 --- a/drivers/extcon/Makefile +++ b/drivers/extcon/Makefile @@ -8,6 +8,7 @@ obj-$(CONFIG_EXTCON_ARIZONA) += extcon-arizona.o obj-$(CONFIG_EXTCON_GPIO) += extcon-gpio.o obj-$(CONFIG_EXTCON_MAX14577) += extcon-max14577.o obj-$(CONFIG_EXTCON_MAX77693) += extcon-max77693.o +obj-$(CONFIG_EXTCON_MAX77843) += extcon-max77843.o obj-$(CONFIG_EXTCON_MAX8997) += extcon-max8997.o obj-$(CONFIG_EXTCON_PALMAS) += extcon-palmas.o obj-$(CONFIG_EXTCON_RT8973A) += extcon-rt8973a.o diff --git a/drivers/extcon/extcon-max77843.c b/drivers/extcon/extcon-max77843.c new file mode 100644 index 0000000..caae9a7 --- /dev/null +++ b/drivers/extcon/extcon-max77843.c @@ -0,0 +1,871 @@ +/* + * extcon-max77843.c - MAX77843 extcon driver to support MUIC + * + * Copyright (C) 2014 Samsung Electrnoics + * Author: Jaewon Kim + * + * 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 +#include +#include +#include +#include +#include +#include +#include + +#define DELAY_MS_DEFAULT 15000 /* unit: millisecond */ + +enum max77843_muic_acc_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, +}; + +enum max77843_muic_cable_group { + MAX77843_CABLE_GROUP_ADC = 0, + MAX77843_CABLE_GROUP_CHG, + MAX77843_CABLE_GROUP_GND, +}; + +enum max77843_muic_adv_debounce_time { + MAX77843_DEBOUNCE_TIME_5MS = 0, + MAX77843_DEBOUNCE_TIME_10MS, + MAX77843_DEBOUNCE_TIME_25MS, + MAX77843_DEBOUNCE_TIME_38_62MS, +}; + +enum max77843_muic_support_list { + EXTCON_CABLE_USB = 0, + EXTCON_CABLE_USB_HOST, + EXTCON_CABLE_USB_HOST_TA, + EXTCON_CABLE_TA, + EXTCON_CABLE_FAST_CHARGER, + EXTCON_CABLE_SLOW_CHARGER, + EXTCON_CABLE_CHARGE_DOWNSTREAM, + EXTCON_CABLE_MHL, + EXTCON_CABLE_MHL_TA, + EXTCON_CABLE_JIG_USB_ON, + EXTCON_CABLE_JIG_USB_OFF, + EXTCON_CABLE_JIG_UART_OFF, + EXTCON_CABLE_JIG_UART_ON, + + EXTCON_CABLE_NUM, +}; + +enum max77843_muic_gnd_cable { + MAX77843_MUIC_GND_USB_OTG = 0x0, + MAX77843_MUIC_GND_USB_OTG_VB = 0x1, + MAX77843_MUIC_GND_MHL = 0x2, + MAX77843_MUIC_GND_MHL_VB = 0x3, + + MAX77843_MUIC_GND_NUM, +}; + +enum max77843_muic_status { + MAX77843_MUIC_STATUS1 = 0, + MAX77843_MUIC_STATUS2, + MAX77843_MUIC_STATUS3, + + MAX77843_MUIC_STATUS_NUM, +}; + +enum max77843_muic_charger_type { + MAX77843_CHG_TYPE_NONE = 0, + MAX77843_CHG_TYPE_USB, + MAX77843_CHG_TYPE_DOWNSTREAM, + MAX77843_CHG_TYPE_DEDICATED, + MAX77843_CHG_TYPE_SPECIAL_500MA, + MAX77843_CHG_TYPE_SPECIAL_1A, + MAX77843_CHG_TYPE_SPECIAL_BIAS, + + MAX77843_CHG_TYPE_END, +}; + +enum max77843_muic_detection { + MAX77843_MUIC_AUTO_NONE = 0, + MAX77843_MUIC_AUTO_USB, + MAX77843_MUIC_AUTO_FAC, + MAX77843_MUIC_AUTO_USB_FAC, +}; + +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; + struct max77843_muic_irq *muic_irqs; + + u8 status[MAX77843_MUIC_STATUS_NUM]; + int prev_cable_type; + int prev_chg_type; + int prev_gnd_type; + + bool irq_adc; + bool irq_chg; + bool init_done; +}; + +struct max77843_muic_irq { + unsigned int irq; + const char *name; + unsigned int virq; +}; + +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[] = { + /* MUIC:INT1 interrupts */ + { .reg_offset = 0, .mask = MAX77843_MUIC_ADC, }, + { .reg_offset = 0, .mask = MAX77843_MUIC_ADCERROR, }, + { .reg_offset = 0, .mask = MAX77843_MUIC_ADC1K, }, + + /* MUIC:INT2 interrupts */ + { .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, }, + + /* MUIC:INT3 interrupts */ + { .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 const char *max77843_extcon_cable[] = { + [EXTCON_CABLE_USB] = "USB", + [EXTCON_CABLE_USB_HOST] = "USB-HOST", + [EXTCON_CABLE_USB_HOST_TA] = "USB-HOST-TA", + [EXTCON_CABLE_TA] = "TA", + [EXTCON_CABLE_FAST_CHARGER] = "FAST-CHARGER", + [EXTCON_CABLE_SLOW_CHARGER] = "SLOW-CHARGER", + [EXTCON_CABLE_CHARGE_DOWNSTREAM] = "CHARGER-DOWNSTREAM", + [EXTCON_CABLE_MHL] = "MHL", + [EXTCON_CABLE_MHL_TA] = "MHL-TA", + [EXTCON_CABLE_JIG_USB_ON] = "JIG-USB-ON", + [EXTCON_CABLE_JIG_USB_OFF] = "JIG-USB-OFF", + [EXTCON_CABLE_JIG_UART_OFF] = "JIG-UART-OFF", + [EXTCON_CABLE_JIG_UART_ON] = "JIG-UART-ON", +}; + +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 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 = MAX77843_SWITCH_OPEN; + + ret = regmap_update_bits(max77843->regmap_muic, + MAX77843_MUIC_REG_CONTROL1, + MAX77843_SIWTH_PORT, 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: + if (adc == MAX77843_MUIC_ADC_GROUND) { + *attached = true; + cable_type = adc; + break; + } + + chg_type = info->status[MAX77843_MUIC_STATUS2] & + MAX77843_MUIC_STATUS2_CHGTYP_MASK; + chg_type >>= STATUS2_CHGTYP_SHIFT; + + if (chg_type == MAX77843_CHG_TYPE_NONE) { + *attached = false; + cable_type = info->prev_chg_type; + info->prev_chg_type = MAX77843_CHG_TYPE_NONE; + } else { + *attached = true; + cable_type = info->prev_chg_type = chg_type; + } + + break; + case MAX77843_CABLE_GROUP_GND: + adc = info->status[MAX77843_MUIC_STATUS1] & + MAX77843_MUIC_STATUS1_ADC_MASK; + adc >>= STATUS1_ADC_SHIFT; + + if (adc == MAX77843_MUIC_ADC_GROUND) { + *attached = true; + gnd_type = (info->status[MAX77843_MUIC_STATUS1] & + MAX77843_MUIC_STATUS1_ADC1K_MASK) >> + (STATUS1_ADC1K_SHIFT-1); + gnd_type |= (info->status[MAX77843_MUIC_STATUS2] & + MAX77843_MUIC_STATUS2_VBVOLT_MASK) >> + STATUS2_VBVOLT_SHIFT; + cable_type = info->prev_gnd_type = gnd_type; + } else { + *attached = false; + cable_type = info->prev_gnd_type; + info->prev_gnd_type = MAX77843_MUIC_GND_NUM; + } + + 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; + u8 path; + bool attached; + + gnd_cable_type = max77843_muic_get_cable_type(info, + MAX77843_CABLE_GROUP_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_OTG: + extcon_set_cable_state(info->edev, "USB-HOST", attached); + path = MAX77843_SWITCH_USB; + info->irq_chg = false; + break; + case MAX77843_MUIC_GND_USB_OTG_VB: + extcon_set_cable_state(info->edev, "USB-HOST-TA", attached); + path = MAX77843_SWITCH_USB; + info->irq_chg = false; + break; + case MAX77843_MUIC_GND_MHL: + extcon_set_cable_state(info->edev, "MHL", attached); + path = MAX77843_SWITCH_OPEN; + info->irq_chg = false; + break; + case MAX77843_MUIC_GND_MHL_VB: + extcon_set_cable_state(info->edev, "MHL-TA", attached); + path = MAX77843_SWITCH_OPEN; + info->irq_chg = false; + break; + default: + dev_err(info->dev, "Cannot detect %s cable of gnd type\n", + attached ? "attached" : "detached"); + return -EINVAL; + } + + ret = max77843_muic_set_path(info, path, attached); + if (ret < 0) + return ret; + + return 0; +} + +static int max77843_muic_jig_handler(struct max77843_muic_info *info, + int cable_type, bool attached) +{ + char cable_name[32]; + u8 path = MAX77843_SWITCH_OPEN; + 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: + strcpy(cable_name, "JIG-USB-OFF"); + path = MAX77843_SWITCH_USB; + break; + case MAX77843_MUIC_ADC_FACTORY_MODE_USB_ON: + strcpy(cable_name, "JIG-USB-ON"); + path = MAX77843_SWITCH_USB; + break; + case MAX77843_MUIC_ADC_FACTORY_MODE_UART_OFF: + strcpy(cable_name, "JIG-UART-OFF"); + path = MAX77843_SWITCH_UART; + break; + default: + break; + } + + ret = max77843_muic_set_path(info, path, attached); + if (ret < 0) + return ret; + + extcon_set_cable_state(info->edev, cable_name, attached); + + 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; + bool attached; + u8 path = MAX77843_SWITCH_OPEN; + + 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_CHG_TYPE_USB: + path = MAX77843_SWITCH_USB; + extcon_set_cable_state(info->edev, "USB", attached); + break; + case MAX77843_CHG_TYPE_DOWNSTREAM: + path = MAX77843_SWITCH_OPEN; + extcon_set_cable_state(info->edev, + "CHARGER-DOWNSTREAM", attached); + break; + case MAX77843_CHG_TYPE_DEDICATED: + path = MAX77843_SWITCH_OPEN; + extcon_set_cable_state(info->edev, "TA", attached); + break; + case MAX77843_CHG_TYPE_SPECIAL_500MA: + path = MAX77843_SWITCH_OPEN; + extcon_set_cable_state(info->edev, "SLOW-CHAREGER", attached); + break; + case MAX77843_CHG_TYPE_SPECIAL_1A: + path = MAX77843_SWITCH_OPEN; + extcon_set_cable_state(info->edev, "FAST-CHARGER", attached); + break; + case MAX77843_CHG_TYPE_SPECIAL_BIAS: + path = MAX77843_SWITCH_OPEN; + break; + case MAX77843_CHG_TYPE_NONE: + return 0; + default: + dev_err(info->dev, + "failed to detect %s accessory (chg_type:0x%x)\n", + attached ? "attached" : "detached", chg_type); + return -EINVAL; + } + + ret = max77843_muic_set_path(info, path, attached); + if (ret < 0) + return ret; + + 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; + + if (!info->edev) + return; + + 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; + + if (!info->init_done) + return IRQ_HANDLED; + + for (i = 0; i < ARRAY_SIZE(max77843_muic_irqs); i++) + if (irq == info->muic_irqs[i].virq) + irq_type = info->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_CHG_TYPE_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_adv_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) { + 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) { + 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; + info->muic_irqs = max77843_muic_irqs; + info->init_done = false; + + platform_set_drvdata(pdev, info); + mutex_init(&info->mutex); + INIT_WORK(&info->irq_work, max77843_muic_irq_work); + + /* 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, + MAX77843_MUIC_AUTO_NONE << CONTROL4_USBAUTO_SHIFT); + + /* Support virtual irq domain for max77843 MUIC device */ + for (i = 0; i < ARRAY_SIZE(max77843_muic_irqs); i++) { + struct max77843_muic_irq *muic_irq = &info->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: irq request (IRQ: %d, error: %d)\n", + muic_irq->irq, ret); + goto err_muic_irq; + } + } + + /* 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; + } + + info->edev->name = dev_name(&pdev->dev); + + 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, MAX77843_SWITCH_UART, true); + + /* 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)); + + /* 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"); + return ret; + } + dev_info(info->dev, "MUIC device ID : 0x%x\n", id); + + info->init_done = true; + + return 0; + +err_muic_irq: + regmap_del_irq_chip(max77843->irq, max77843->irq_data_muic); + + return ret; +} + +static int max77843_muic_remove(struct platform_device *pdev) +{ + struct max77843_muic_info *info = platform_get_drvdata(pdev); + + cancel_work_sync(&info->irq_work); + + return 0; +} + +static const struct platform_device_id max77843_muic_id[] = { + { "max77843-muic", }, + { }, +}; +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 "); +MODULE_LICENSE("GPL"); -- 1.7.9.5