// SPDX-License-Identifier: GPL-2.0-only /* * extcon-axp288.c - X-Power AXP288 PMIC extcon cable detection driver * * Copyright (c) 2017-2018 Hans de Goede <[email protected]> * Copyright (C) 2015 Intel Corporation * Author: Ramakrishna Pallala <[email protected]> */ #include <linux/acpi.h> #include <linux/module.h> #include <linux/kernel.h> #include <linux/io.h> #include <linux/slab.h> #include <linux/interrupt.h> #include <linux/platform_device.h> #include <linux/property.h> #include <linux/notifier.h> #include <linux/extcon-provider.h> #include <linux/regmap.h> #include <linux/mfd/axp20x.h> #include <linux/usb/role.h> #include <linux/workqueue.h> #include <asm/cpu_device_id.h> #include <asm/intel-family.h> #include <asm/iosf_mbi.h> /* Power source status register */ #define PS_STAT_VBUS_TRIGGER … #define PS_STAT_BAT_CHRG_DIR … #define PS_STAT_VBUS_ABOVE_VHOLD … #define PS_STAT_VBUS_VALID … #define PS_STAT_VBUS_PRESENT … /* BC module global register */ #define BC_GLOBAL_RUN … #define BC_GLOBAL_DET_STAT … #define BC_GLOBAL_DBP_TOUT … #define BC_GLOBAL_VLGC_COM_SEL … #define BC_GLOBAL_DCD_TOUT_MASK … #define BC_GLOBAL_DCD_TOUT_300MS … #define BC_GLOBAL_DCD_TOUT_100MS … #define BC_GLOBAL_DCD_TOUT_500MS … #define BC_GLOBAL_DCD_TOUT_900MS … #define BC_GLOBAL_DCD_DET_SEL … /* BC module vbus control and status register */ #define VBUS_CNTL_DPDM_PD_EN … #define VBUS_CNTL_DPDM_FD_EN … #define VBUS_CNTL_FIRST_PO_STAT … /* BC USB status register */ #define USB_STAT_BUS_STAT_MASK … #define USB_STAT_BUS_STAT_SHIFT … #define USB_STAT_BUS_STAT_ATHD … #define USB_STAT_BUS_STAT_CONN … #define USB_STAT_BUS_STAT_SUSP … #define USB_STAT_BUS_STAT_CONF … #define USB_STAT_USB_SS_MODE … #define USB_STAT_DEAD_BAT_DET … #define USB_STAT_DBP_UNCFG … /* BC detect status register */ #define DET_STAT_MASK … #define DET_STAT_SHIFT … #define DET_STAT_SDP … #define DET_STAT_CDP … #define DET_STAT_DCP … enum axp288_extcon_reg { … }; enum axp288_extcon_irq { … }; static const unsigned int axp288_extcon_cables[] = …; struct axp288_extcon_info { … }; static const struct x86_cpu_id cherry_trail_cpu_ids[] = …; /* Power up/down reason string array */ static const char * const axp288_pwr_up_down_info[] = …; /* * Decode and log the given "reset source indicator" (rsi) * register and then clear it. */ static void axp288_extcon_log_rsi(struct axp288_extcon_info *info) { … } /* * The below code to control the USB role-switch on devices with an AXP288 * may seem out of place, but there are 2 reasons why this is the best place * to control the USB role-switch on such devices: * 1) On many devices the USB role is controlled by AML code, but the AML code * only switches between the host and none roles, because of Windows not * really using device mode. To make device mode work we need to toggle * between the none/device roles based on Vbus presence, and this driver * gets interrupts on Vbus insertion / removal. * 2) In order for our BC1.2 charger detection to work properly the role * mux must be properly set to device mode before we do the detection. */ /* Returns the id-pin value, note pulled low / false == host-mode */ static bool axp288_get_id_pin(struct axp288_extcon_info *info) { … } static void axp288_usb_role_work(struct work_struct *work) { … } static bool axp288_get_vbus_attach(struct axp288_extcon_info *info) { … } static int axp288_handle_chrg_det_event(struct axp288_extcon_info *info) { … } static int axp288_extcon_id_evt(struct notifier_block *nb, unsigned long event, void *param) { … } static irqreturn_t axp288_extcon_isr(int irq, void *data) { … } static int axp288_extcon_enable(struct axp288_extcon_info *info) { … } static void axp288_put_role_sw(void *data) { … } static int axp288_extcon_find_role_sw(struct axp288_extcon_info *info) { … } static int axp288_extcon_probe(struct platform_device *pdev) { … } static int __maybe_unused axp288_extcon_suspend(struct device *dev) { … } static int __maybe_unused axp288_extcon_resume(struct device *dev) { … } static SIMPLE_DEV_PM_OPS(axp288_extcon_pm_ops, axp288_extcon_suspend, axp288_extcon_resume); static const struct platform_device_id axp288_extcon_table[] = …; MODULE_DEVICE_TABLE(platform, axp288_extcon_table); static struct platform_driver axp288_extcon_driver = …; module_platform_driver(…) …; MODULE_AUTHOR(…) …; MODULE_AUTHOR(…) …; MODULE_DESCRIPTION(…) …; MODULE_LICENSE(…) …;
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