815429b39d
The extcon core already provides the extcon_register_notifier() function in order to register the notifier block which is used to monitor the state change for the specific external connector such as EXTCON_USB, EXTCON_USB_HOST and so on. The extcon consumer uses the this function. The extcon consumer might need to monitor the all supported external connectors from the extcon device. In this case, The extcon consumer should have each notifier_block structure for each external connector. This patch adds the new extcon_register_notifier_all() function that extcon consumer is able to monitor the state change of all supported external connectors by using only one notifier_block structure. - List of new added functions: int extcon_register_notifier_all(struct extcon_dev *edev, struct notifier_block *nb); int extcon_unregister_notifier_all(struct extcon_dev *edev, struct notifier_block *nb); int devm_extcon_register_notifier_all(struct device *dev, struct extcon_dev *edev, struct notifier_block *nb); void devm_extcon_unregister_notifier_all(struct device *dev, struct extcon_dev *edev, struct notifier_block *nb); Suggested-by: Hans de Goede <hdegoede@redhat.com> Signed-off-by: Chanwoo Choi <cw00.choi@samsung.com> Tested-by: Hans de Goede <hdegoede@redhat.com> Acked-by: Hans de Goede <hdegoede@redhat.com>
437 lines
13 KiB
C
437 lines
13 KiB
C
/*
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* External connector (extcon) class driver
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*
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* Copyright (C) 2015 Samsung Electronics
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* Author: Chanwoo Choi <cw00.choi@samsung.com>
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*
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* Copyright (C) 2012 Samsung Electronics
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* Author: Donggeun Kim <dg77.kim@samsung.com>
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* Author: MyungJoo Ham <myungjoo.ham@samsung.com>
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*
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* based on switch class driver
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* Copyright (C) 2008 Google, Inc.
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* Author: Mike Lockwood <lockwood@android.com>
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*
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* This software is licensed under the terms of the GNU General Public
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* License version 2, as published by the Free Software Foundation, and
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* may be copied, distributed, and modified under those terms.
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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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#ifndef __LINUX_EXTCON_H__
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#define __LINUX_EXTCON_H__
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#include <linux/device.h>
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/*
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* Define the type of supported external connectors
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*/
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#define EXTCON_TYPE_USB BIT(0) /* USB connector */
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#define EXTCON_TYPE_CHG BIT(1) /* Charger connector */
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#define EXTCON_TYPE_JACK BIT(2) /* Jack connector */
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#define EXTCON_TYPE_DISP BIT(3) /* Display connector */
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#define EXTCON_TYPE_MISC BIT(4) /* Miscellaneous connector */
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/*
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* Define the unique id of supported external connectors
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*/
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#define EXTCON_NONE 0
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/* USB external connector */
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#define EXTCON_USB 1
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#define EXTCON_USB_HOST 2
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/*
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* Charging external connector
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*
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* When one SDP charger connector was reported, we should also report
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* the USB connector, which means EXTCON_CHG_USB_SDP should always
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* appear together with EXTCON_USB. The same as ACA charger connector,
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* EXTCON_CHG_USB_ACA would normally appear with EXTCON_USB_HOST.
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*
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* The EXTCON_CHG_USB_SLOW connector can provide at least 500mA of
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* current at 5V. The EXTCON_CHG_USB_FAST connector can provide at
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* least 1A of current at 5V.
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*/
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#define EXTCON_CHG_USB_SDP 5 /* Standard Downstream Port */
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#define EXTCON_CHG_USB_DCP 6 /* Dedicated Charging Port */
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#define EXTCON_CHG_USB_CDP 7 /* Charging Downstream Port */
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#define EXTCON_CHG_USB_ACA 8 /* Accessory Charger Adapter */
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#define EXTCON_CHG_USB_FAST 9
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#define EXTCON_CHG_USB_SLOW 10
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#define EXTCON_CHG_WPT 11 /* Wireless Power Transfer */
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#define EXTCON_CHG_USB_PD 12 /* USB Power Delivery */
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/* Jack external connector */
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#define EXTCON_JACK_MICROPHONE 20
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#define EXTCON_JACK_HEADPHONE 21
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#define EXTCON_JACK_LINE_IN 22
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#define EXTCON_JACK_LINE_OUT 23
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#define EXTCON_JACK_VIDEO_IN 24
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#define EXTCON_JACK_VIDEO_OUT 25
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#define EXTCON_JACK_SPDIF_IN 26 /* Sony Philips Digital InterFace */
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#define EXTCON_JACK_SPDIF_OUT 27
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/* Display external connector */
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#define EXTCON_DISP_HDMI 40 /* High-Definition Multimedia Interface */
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#define EXTCON_DISP_MHL 41 /* Mobile High-Definition Link */
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#define EXTCON_DISP_DVI 42 /* Digital Visual Interface */
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#define EXTCON_DISP_VGA 43 /* Video Graphics Array */
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#define EXTCON_DISP_DP 44 /* Display Port */
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#define EXTCON_DISP_HMD 45 /* Head-Mounted Display */
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/* Miscellaneous external connector */
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#define EXTCON_DOCK 60
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#define EXTCON_JIG 61
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#define EXTCON_MECHANICAL 62
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#define EXTCON_NUM 63
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/*
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* Define the property of supported external connectors.
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*
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* When adding the new extcon property, they *must* have
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* the type/value/default information. Also, you *have to*
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* modify the EXTCON_PROP_[type]_START/END definitions
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* which mean the range of the supported properties
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* for each extcon type.
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*
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* The naming style of property
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* : EXTCON_PROP_[type]_[property name]
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*
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* EXTCON_PROP_USB_[property name] : USB property
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* EXTCON_PROP_CHG_[property name] : Charger property
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* EXTCON_PROP_JACK_[property name] : Jack property
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* EXTCON_PROP_DISP_[property name] : Display property
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*/
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/*
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* Properties of EXTCON_TYPE_USB.
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*
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* - EXTCON_PROP_USB_VBUS
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* @type: integer (intval)
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* @value: 0 (low) or 1 (high)
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* @default: 0 (low)
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* - EXTCON_PROP_USB_TYPEC_POLARITY
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* @type: integer (intval)
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* @value: 0 (normal) or 1 (flip)
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* @default: 0 (normal)
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* - EXTCON_PROP_USB_SS (SuperSpeed)
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* @type: integer (intval)
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* @value: 0 (USB/USB2) or 1 (USB3)
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* @default: 0 (USB/USB2)
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*
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*/
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#define EXTCON_PROP_USB_VBUS 0
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#define EXTCON_PROP_USB_TYPEC_POLARITY 1
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#define EXTCON_PROP_USB_SS 2
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#define EXTCON_PROP_USB_MIN 0
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#define EXTCON_PROP_USB_MAX 2
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#define EXTCON_PROP_USB_CNT (EXTCON_PROP_USB_MAX - EXTCON_PROP_USB_MIN + 1)
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/* Properties of EXTCON_TYPE_CHG. */
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#define EXTCON_PROP_CHG_MIN 50
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#define EXTCON_PROP_CHG_MAX 50
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#define EXTCON_PROP_CHG_CNT (EXTCON_PROP_CHG_MAX - EXTCON_PROP_CHG_MIN + 1)
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/* Properties of EXTCON_TYPE_JACK. */
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#define EXTCON_PROP_JACK_MIN 100
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#define EXTCON_PROP_JACK_MAX 100
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#define EXTCON_PROP_JACK_CNT (EXTCON_PROP_JACK_MAX - EXTCON_PROP_JACK_MIN + 1)
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/*
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* Properties of EXTCON_TYPE_DISP.
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*
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* - EXTCON_PROP_DISP_HPD (Hot Plug Detect)
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* @type: integer (intval)
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* @value: 0 (no hpd) or 1 (hpd)
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* @default: 0 (no hpd)
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*
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*/
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#define EXTCON_PROP_DISP_HPD 150
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/* Properties of EXTCON_TYPE_DISP. */
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#define EXTCON_PROP_DISP_MIN 150
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#define EXTCON_PROP_DISP_MAX 151
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#define EXTCON_PROP_DISP_CNT (EXTCON_PROP_DISP_MAX - EXTCON_PROP_DISP_MIN + 1)
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/*
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* Define the type of property's value.
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*
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* Define the property's value as union type. Because each property
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* would need the different data type to store it.
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*/
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union extcon_property_value {
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int intval; /* type : integer (intval) */
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};
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struct extcon_cable;
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struct extcon_dev;
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#if IS_ENABLED(CONFIG_EXTCON)
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/*
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* Following APIs are for notifiers or configurations.
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* Notifiers are the external port and connection devices.
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*/
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extern int extcon_dev_register(struct extcon_dev *edev);
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extern void extcon_dev_unregister(struct extcon_dev *edev);
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extern int devm_extcon_dev_register(struct device *dev,
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struct extcon_dev *edev);
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extern void devm_extcon_dev_unregister(struct device *dev,
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struct extcon_dev *edev);
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extern struct extcon_dev *extcon_get_extcon_dev(const char *extcon_name);
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/*
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* Following APIs control the memory of extcon device.
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*/
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extern struct extcon_dev *extcon_dev_allocate(const unsigned int *cable);
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extern void extcon_dev_free(struct extcon_dev *edev);
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extern struct extcon_dev *devm_extcon_dev_allocate(struct device *dev,
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const unsigned int *cable);
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extern void devm_extcon_dev_free(struct device *dev, struct extcon_dev *edev);
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/*
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* get/set_state access each bit of the 32b encoded state value.
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* They are used to access the status of each cable based on the cable id.
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*/
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extern int extcon_get_state(struct extcon_dev *edev, unsigned int id);
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extern int extcon_set_state(struct extcon_dev *edev, unsigned int id,
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bool cable_state);
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extern int extcon_set_state_sync(struct extcon_dev *edev, unsigned int id,
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bool cable_state);
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/*
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* Synchronize the state and property data for a specific external connector.
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*/
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extern int extcon_sync(struct extcon_dev *edev, unsigned int id);
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/*
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* get/set_property access the property value of each external connector.
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* They are used to access the property of each cable based on the property id.
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*/
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extern int extcon_get_property(struct extcon_dev *edev, unsigned int id,
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unsigned int prop,
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union extcon_property_value *prop_val);
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extern int extcon_set_property(struct extcon_dev *edev, unsigned int id,
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unsigned int prop,
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union extcon_property_value prop_val);
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extern int extcon_set_property_sync(struct extcon_dev *edev, unsigned int id,
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unsigned int prop,
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union extcon_property_value prop_val);
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/*
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* get/set_property_capability set the capability of the property for each
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* external connector. They are used to set the capability of the property
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* of each external connector based on the id and property.
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*/
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extern int extcon_get_property_capability(struct extcon_dev *edev,
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unsigned int id, unsigned int prop);
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extern int extcon_set_property_capability(struct extcon_dev *edev,
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unsigned int id, unsigned int prop);
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/*
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* Following APIs are to monitor the status change of the external connectors.
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* extcon_register_notifier(*edev, id, *nb) : Register a notifier block
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* for specific external connector of the extcon.
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* extcon_register_notifier_all(*edev, *nb) : Register a notifier block
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* for all supported external connectors of the extcon.
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*/
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extern int extcon_register_notifier(struct extcon_dev *edev, unsigned int id,
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struct notifier_block *nb);
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extern int extcon_unregister_notifier(struct extcon_dev *edev, unsigned int id,
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struct notifier_block *nb);
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extern int devm_extcon_register_notifier(struct device *dev,
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struct extcon_dev *edev, unsigned int id,
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struct notifier_block *nb);
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extern void devm_extcon_unregister_notifier(struct device *dev,
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struct extcon_dev *edev, unsigned int id,
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struct notifier_block *nb);
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extern int extcon_register_notifier_all(struct extcon_dev *edev,
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struct notifier_block *nb);
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extern int extcon_unregister_notifier_all(struct extcon_dev *edev,
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struct notifier_block *nb);
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extern int devm_extcon_register_notifier_all(struct device *dev,
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struct extcon_dev *edev,
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struct notifier_block *nb);
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extern void devm_extcon_unregister_notifier_all(struct device *dev,
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struct extcon_dev *edev,
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struct notifier_block *nb);
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/*
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* Following API get the extcon device from devicetree.
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* This function use phandle of devicetree to get extcon device directly.
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*/
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extern struct extcon_dev *extcon_get_edev_by_phandle(struct device *dev,
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int index);
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/* Following API to get information of extcon device */
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extern const char *extcon_get_edev_name(struct extcon_dev *edev);
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#else /* CONFIG_EXTCON */
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static inline int extcon_dev_register(struct extcon_dev *edev)
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{
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return 0;
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}
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static inline void extcon_dev_unregister(struct extcon_dev *edev) { }
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static inline int devm_extcon_dev_register(struct device *dev,
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struct extcon_dev *edev)
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{
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return -EINVAL;
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}
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static inline void devm_extcon_dev_unregister(struct device *dev,
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struct extcon_dev *edev) { }
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static inline struct extcon_dev *extcon_dev_allocate(const unsigned int *cable)
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{
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return ERR_PTR(-ENOSYS);
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}
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static inline void extcon_dev_free(struct extcon_dev *edev) { }
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static inline struct extcon_dev *devm_extcon_dev_allocate(struct device *dev,
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const unsigned int *cable)
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{
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return ERR_PTR(-ENOSYS);
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}
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static inline void devm_extcon_dev_free(struct extcon_dev *edev) { }
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static inline int extcon_get_state(struct extcon_dev *edev, unsigned int id)
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{
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return 0;
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}
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static inline int extcon_set_state(struct extcon_dev *edev, unsigned int id,
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bool cable_state)
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{
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return 0;
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}
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static inline int extcon_set_state_sync(struct extcon_dev *edev, unsigned int id,
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bool cable_state)
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{
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return 0;
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}
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static inline int extcon_sync(struct extcon_dev *edev, unsigned int id)
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{
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return 0;
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}
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static inline int extcon_get_property(struct extcon_dev *edev, unsigned int id,
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unsigned int prop,
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union extcon_property_value *prop_val)
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{
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return 0;
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}
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static inline int extcon_set_property(struct extcon_dev *edev, unsigned int id,
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unsigned int prop,
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union extcon_property_value prop_val)
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{
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return 0;
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}
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static inline int extcon_set_property_sync(struct extcon_dev *edev,
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unsigned int id, unsigned int prop,
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union extcon_property_value prop_val)
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{
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return 0;
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}
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static inline int extcon_get_property_capability(struct extcon_dev *edev,
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unsigned int id, unsigned int prop)
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{
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return 0;
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}
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static inline int extcon_set_property_capability(struct extcon_dev *edev,
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unsigned int id, unsigned int prop)
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{
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return 0;
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}
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static inline struct extcon_dev *extcon_get_extcon_dev(const char *extcon_name)
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{
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return NULL;
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}
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static inline int extcon_register_notifier(struct extcon_dev *edev,
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unsigned int id,
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struct notifier_block *nb)
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{
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return 0;
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}
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static inline int extcon_unregister_notifier(struct extcon_dev *edev,
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unsigned int id,
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struct notifier_block *nb)
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{
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return 0;
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}
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static inline int devm_extcon_register_notifier(struct device *dev,
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struct extcon_dev *edev, unsigned int id,
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struct notifier_block *nb)
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{
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return -ENOSYS;
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}
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static inline void devm_extcon_unregister_notifier(struct device *dev,
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struct extcon_dev *edev, unsigned int id,
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struct notifier_block *nb) { }
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static inline struct extcon_dev *extcon_get_edev_by_phandle(struct device *dev,
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int index)
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{
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return ERR_PTR(-ENODEV);
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}
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#endif /* CONFIG_EXTCON */
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/*
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* Following structure and API are deprecated. EXTCON remains the function
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* definition to prevent the build break.
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*/
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struct extcon_specific_cable_nb {
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struct notifier_block *user_nb;
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int cable_index;
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struct extcon_dev *edev;
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unsigned long previous_value;
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};
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static inline int extcon_register_interest(struct extcon_specific_cable_nb *obj,
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const char *extcon_name, const char *cable_name,
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struct notifier_block *nb)
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{
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return -EINVAL;
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}
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static inline int extcon_unregister_interest(struct extcon_specific_cable_nb
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*obj)
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{
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return -EINVAL;
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}
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static inline int extcon_get_cable_state_(struct extcon_dev *edev, unsigned int id)
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{
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return extcon_get_state(edev, id);
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}
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static inline int extcon_set_cable_state_(struct extcon_dev *edev, unsigned int id,
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bool cable_state)
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{
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return extcon_set_state_sync(edev, id, cable_state);
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}
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#endif /* __LINUX_EXTCON_H__ */
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