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/Linux-v5.10/drivers/usb/roles/
Dclass.c1 // SPDX-License-Identifier: GPL-2.0
3 * USB Role Switch Support
10 #include <linux/usb/role.h>
22 enum usb_role role; member
36 * usb_role_switch_set_role - Set USB role for a switch
37 * @sw: USB role switch
38 * @role: USB role to be switched to
40 * Set USB role @role for @sw.
42 int usb_role_switch_set_role(struct usb_role_switch *sw, enum usb_role role) in usb_role_switch_set_role() argument
49 mutex_lock(&sw->lock); in usb_role_switch_set_role()
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DKconfig1 # SPDX-License-Identifier: GPL-2.0
4 tristate "USB Role Switch Support"
6 USB Role Switch is a device that can select the USB role - host or
7 device - for a USB port (connector). In most cases dual-role capable
8 USB controller will also represent the switch, but on some platforms
9 multiplexer/demultiplexer switch is used to route the data lines on
10 the USB connector between separate USB host and device controllers.
12 Say Y here if your USB connectors support both device and host roles.
19 tristate "Intel XHCI USB Role Switch"
22 Driver for the internal USB role switch for switching the USB data
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Dintel-xhci-usb-role-switch.c1 // SPDX-License-Identifier: GPL-2.0+
3 * Intel XHCI (Cherry Trail, Broxton and others) USB OTG role switch driver
5 * Copyright (c) 2016-2017 Hans de Goede <hdegoede@redhat.com>
23 #include <linux/usb/role.h>
52 "intel-xhci-usb-sw",
56 enum usb_role role) in intel_xhci_usb_set_role() argument
71 dev_err(data->dev, "Error could not acquire lock\n"); in intel_xhci_usb_set_role()
72 return -EIO; in intel_xhci_usb_set_role()
75 pm_runtime_get_sync(data->dev); in intel_xhci_usb_set_role()
80 * SW_SWITCH_EN bits to be zero for role switch, in intel_xhci_usb_set_role()
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/Linux-v5.10/Documentation/devicetree/bindings/usb/
Dmediatek,mtu3.txt4 - compatible : should be "mediatek,<soc-model>-mtu3", "mediatek,mtu3",
5 soc-model is the name of SoC, such as mt8173, mt2712 etc,
8 - "mediatek,mt8173-mtu3"
9 - reg : specifies physical base address and size of the registers
10 - reg-names: should be "mac" for device IP and "ippc" for IP port control
11 - interrupts : interrupt used by the device IP
12 - power-domains : a phandle to USB power domain node to control USB's
14 - vusb33-supply : regulator of USB avdd3.3v
15 - clocks : a list of phandle + clock-specifier pairs, one for each
16 entry in clock-names
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Dmediatek,musb.txt2 -------------------------------------------
5 - compatible : should be one of:
6 "mediatek,mt2701-musb"
8 followed by "mediatek,mtk-musb"
9 - reg : specifies physical base address and size of
11 - interrupts : interrupt used by musb controller
12 - interrupt-names : must be "mc"
13 - phys : PHY specifier for the OTG phy
14 - dr_mode : should be one of "host", "peripheral" or "otg",
15 refer to usb/generic.txt
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Dgeneric.txt1 Generic USB Properties
4 - maximum-speed: tells USB controllers we want to work up to a certain
5 speed. Valid arguments are "super-speed-plus",
6 "super-speed", "high-speed", "full-speed" and
7 "low-speed". In case this isn't passed via DT, USB
10 - dr_mode: tells Dual-Role USB controllers that we want to work on a
13 passed via DT, USB DRD controllers should default to
15 - phy_type: tells USB controllers that we want to configure the core to support
16 a UTMI+ PHY with an 8- or 16-bit interface if UTMI+ is
18 In case this isn't passed via DT, USB controllers should
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Drenesas,usb3-peri.yaml1 # SPDX-License-Identifier: GPL-2.0-only
3 ---
4 $id: http://devicetree.org/schemas/usb/renesas,usb3-peri.yaml#
5 $schema: http://devicetree.org/meta-schemas/core.yaml#
7 title: Renesas USB 3.0 Peripheral controller
10 - Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com>
15 - enum:
16 - renesas,r8a774a1-usb3-peri # RZ/G2M
17 - renesas,r8a774b1-usb3-peri # RZ/G2N
18 - renesas,r8a774c0-usb3-peri # RZ/G2E
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Dmediatek,mt6360-tcpc.yaml1 # SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
3 ---
4 $id: "http://devicetree.org/schemas/usb/mediatek,mt6360-tcpc.yaml#"
5 $schema: "http://devicetree.org/meta-schemas/core.yaml#"
7 title: Mediatek MT6360 Type-C Port Switch and Power Delivery controller DT bindings
10 - ChiYuan Huang <cy_huang@richtek.com>
13 Mediatek MT6360 is a multi-functional device. It integrates charger, ADC, flash, RGB indicators,
14 regulators (BUCKs/LDOs), and TypeC Port Switch with Power Delivery controller.
15 This document only describes MT6360 Type-C Port Switch and Power Delivery controller.
20 - mediatek,mt6360-tcpc
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/Linux-v5.10/Documentation/ABI/testing/
Dsysfs-class-usb_role5 Place in sysfs for USB Role Switches. USB Role Switch is a
6 device that can select the data role (host or device) for USB
9 What: /sys/class/usb_role/<switch>/role
13 The current role of the switch. This attribute can be used for
14 requesting role swapping with non-USB Type-C ports. With USB
15 Type-C ports, the ABI defined for USB Type-C connector class
19 - none
20 - host
21 - device
/Linux-v5.10/include/linux/usb/
Drole.h1 // SPDX-License-Identifier: GPL-2.0
17 enum usb_role role);
21 * struct usb_role_switch_desc - USB Role Switch Descriptor
22 * @fwnode: The device node to be associated with the role switch
26 * @set: Callback for setting the role
27 * @get: Callback for getting the role (optional)
28 * @allow_userspace_control: If true userspace may change the role through sysfs
30 * @name: Name for the switch (optional)
32 * @usb2_port and @usb3_port will point to the USB host port and @udc to the USB
33 * device controller behind the USB connector with the role switch. If
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/Linux-v5.10/Documentation/usb/
Dchipidea.rst2 ChipIdea Highspeed Dual Role Controller Driver
6 -----------------------------------
12 -------------------------
29 otg-rev = <0x0200>;
30 adp-disable;
33 -------------------
38 2) Connect 2 boards with usb cable with one end is micro A plug, the other end
41 The A-device(with micro A plug inserted) should enumerate B-device.
43 3) Role switch
45 On B-device::
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/Linux-v5.10/drivers/extcon/
DKconfig1 # SPDX-License-Identifier: GPL-2.0-only
11 host USB ports. Many of 30-pin connectors including PDMI are
33 tristate "X-Power AXP288 EXTCON support"
37 Say Y here to enable support for USB peripheral detection
38 and USB MUX switching by X-Power AXP288 PMIC.
47 FSA9480 microUSB switch and accessory detector chip. The FSA9480 is a USB
48 port accessory detector and switch. The FSA9480 is fully controlled using
49 I2C and enables USB data, stereo and mono audio, video, microphone
63 Say Y here to enable extcon support for USB OTG ports controlled by
90 Maxim MAX14577/77836. The MAX14577/77836 MUIC is a USB port accessory
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Dextcon-axp288.c1 // SPDX-License-Identifier: GPL-2.0-only
3 * extcon-axp288.c - X-Power AXP288 PMIC extcon cable detection driver
5 * Copyright (c) 2017-2018 Hans de Goede <hdegoede@redhat.com>
19 #include <linux/extcon-provider.h>
22 #include <linux/usb/role.h>
26 #include <asm/intel-family.h>
52 /* BC USB status register */
136 ret = regmap_read(info->regmap, AXP288_PS_BOOT_REASON_REG, &val); in axp288_extcon_log_rsi()
138 dev_err(info->dev, "failed to read reset source indicator\n"); in axp288_extcon_log_rsi()
142 bits = val & GENMASK(ARRAY_SIZE(axp288_pwr_up_down_info) - 1, 0); in axp288_extcon_log_rsi()
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Dextcon-usbc-cros-ec.c1 // SPDX-License-Identifier: GPL-2.0
7 #include <linux/extcon-provider.h>
28 unsigned int dr; /* data role */
29 bool pr; /* power role (true if VBUS enabled) */
49 * cros_ec_pd_command() - Send a command to the EC.
73 return -ENOMEM; in cros_ec_pd_command()
75 msg->version = version; in cros_ec_pd_command()
76 msg->command = command; in cros_ec_pd_command()
77 msg->outsize = outsize; in cros_ec_pd_command()
78 msg->insize = insize; in cros_ec_pd_command()
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/Linux-v5.10/drivers/usb/common/
Dusb-conn-gpio.c1 // SPDX-License-Identifier: GPL-2.0
3 * USB GPIO Based Connection Detection Driver
9 * Some code borrowed from drivers/extcon/extcon-usb-gpio.c
22 #include <linux/usb/role.h>
53 * Role | ID | VBUS
54 * ------------------------------------
61 * - VBUS only - we want to distinguish between [1] and [2], so ID is always 1
62 * - ID only - we want to distinguish between [1] and [4], so VBUS = ID
67 enum usb_role role; in usb_conn_detect_cable() local
74 id = info->id_gpiod ? in usb_conn_detect_cable()
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/Linux-v5.10/Documentation/driver-api/usb/
Dtypec.rst3 USB Type-C connector class
7 ------------
9 The typec class is meant for describing the USB Type-C ports in a system to the
14 The platforms are expected to register every USB Type-C port they have with the
15 class. In a normal case the registration will be done by a USB Type-C or PD PHY
17 USB PD controller or even driver for Thunderbolt3 controller. This document
18 considers the component registering the USB Type-C ports with the class as "port
26 attributes are described in Documentation/ABI/testing/sysfs-class-typec.
29 --------------------
36 "port0-partner". Full path to the device would be
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/Linux-v5.10/drivers/usb/cdns3/
Dcore.h1 /* SPDX-License-Identifier: GPL-2.0 */
5 * Copyright (C) 2017-2018 NXP
6 * Copyright (C) 2018-2019 Cadence.
11 #include <linux/usb/otg.h>
12 #include <linux/usb/role.h>
20 * struct cdns3_role_driver - host/gadget role driver
21 * @start: start this role
22 * @stop: stop this role
23 * @suspend: suspend callback for this role
24 * @resume: resume callback for this role
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Dcore.c1 // SPDX-License-Identifier: GPL-2.0
5 * Copyright (C) 2018-2019 Cadence.
6 * Copyright (C) 2017-2018 NXP
14 #include <linux/dma-mapping.h>
24 #include "host-export.h"
25 #include "gadget-export.h"
30 static int cdns3_role_start(struct cdns3 *cdns, enum usb_role role) in cdns3_role_start() argument
34 if (WARN_ON(role > USB_ROLE_DEVICE)) in cdns3_role_start()
37 mutex_lock(&cdns->mutex); in cdns3_role_start()
38 cdns->role = role; in cdns3_role_start()
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/Linux-v5.10/drivers/usb/chipidea/
Dotg.c1 // SPDX-License-Identifier: GPL-2.0
3 * otg.c - ChipIdea USB IP core OTG driver
15 #include <linux/usb/otg.h>
16 #include <linux/usb/gadget.h>
17 #include <linux/usb/chipidea.h>
38 cable = &ci->platdata->vbus_extcon; in hw_read_otgsc()
39 if (!IS_ERR(cable->edev) || ci->role_switch) { in hw_read_otgsc()
40 if (cable->changed) in hw_read_otgsc()
45 if (cable->connected) in hw_read_otgsc()
50 if (cable->enabled) in hw_read_otgsc()
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/Linux-v5.10/drivers/misc/
Dhisi_hikey_usb.c1 // SPDX-License-Identifier: GPL-2.0
3 * Support for usb functionality of Hikey series boards
6 * Copyright (C) 2017-2018 Hilisicon Electronics Co., Ltd.
22 #include <linux/usb/role.h>
45 enum usb_role role; member
57 if (hisi_hikey_usb->hub_vbus) in hub_power_ctrl()
58 gpiod_set_value_cansleep(hisi_hikey_usb->hub_vbus, value); in hub_power_ctrl()
60 if (!hisi_hikey_usb->regulator) in hub_power_ctrl()
63 status = regulator_is_enabled(hisi_hikey_usb->regulator); in hub_power_ctrl()
68 ret = regulator_enable(hisi_hikey_usb->regulator); in hub_power_ctrl()
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/Linux-v5.10/drivers/usb/typec/
DKconfig1 # SPDX-License-Identifier: GPL-2.0
4 tristate "USB Type-C Support"
6 USB Type-C Specification defines a cable and connector for USB where
8 be Type-A plug on one end of the cable and Type-B plug on the other.
9 Determination of the host-to-device relationship happens through a
10 specific Configuration Channel (CC) which goes through the USB Type-C
12 Accessory Modes - Analog Audio and Debug - and if USB Power Delivery
14 something else then USB communication.
16 USB Power Delivery Specification defines a protocol that can be used
18 partners. USB Power Delivery allows higher voltages then the normal
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Dqcom-pmic-typec.c1 // SPDX-License-Identifier: GPL-2.0
15 #include <linux/usb/role.h>
16 #include <linux/usb/typec_mux.h>
51 if (enable == qcom_usb->vbus_enabled) in qcom_pmic_typec_enable_vbus_regulator()
55 ret = regulator_enable(qcom_usb->vbus_reg); in qcom_pmic_typec_enable_vbus_regulator()
59 ret = regulator_disable(qcom_usb->vbus_reg); in qcom_pmic_typec_enable_vbus_regulator()
63 qcom_usb->vbus_enabled = enable; in qcom_pmic_typec_enable_vbus_regulator()
69 enum usb_role role; in qcom_pmic_typec_check_connection() local
73 regmap_read(qcom_usb->regmap, qcom_usb->base + TYPEC_MISC_STATUS, in qcom_pmic_typec_check_connection()
80 typec_set_orientation(qcom_usb->port, orientation); in qcom_pmic_typec_check_connection()
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/Linux-v5.10/drivers/usb/typec/mux/
Dintel_pmc_mux.c1 // SPDX-License-Identifier: GPL-2.0
3 * Driver for Intel PMC USB mux control
13 #include <linux/usb/pd.h>
14 #include <linux/usb/role.h>
15 #include <linux/usb/typec_mux.h>
16 #include <linux/usb/typec_dp.h>
17 #include <linux/usb/typec_tbt.h>
131 enum usb_role role; member
153 /* SoC expects the USB Type-C port numbers to start with 0 */ in update_port_status()
154 port_num = port->usb3_port - 1; in update_port_status()
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/Linux-v5.10/drivers/usb/mtu3/
Dmtu3_dr.c1 // SPDX-License-Identifier: GPL-2.0
3 * mtu3_dr.c - dual role switch and host glue layer
10 #include <linux/usb/role.h>
28 switch (state) { in mailbox_state_string()
44 if (!ssusb->otg_switch.is_u3_drd) { in toggle_opstate()
45 mtu3_setbits(ssusb->mac_base, U3D_DEVICE_CONTROL, DC_SESSION); in toggle_opstate()
46 mtu3_setbits(ssusb->mac_base, U3D_POWER_MANAGEMENT, SOFT_CONN); in toggle_opstate()
50 /* only port0 supports dual-role mode */
54 void __iomem *ibase = ssusb->ippc_base; in ssusb_port0_switch()
57 dev_dbg(ssusb->dev, "%s (switch u%d port0 to %s)\n", __func__, in ssusb_port0_switch()
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/Linux-v5.10/drivers/usb/dwc2/
Ddrd.c1 // SPDX-License-Identifier: GPL-2.0
3 * drd.c - DesignWare USB2 DRD Controller Dual-role support
12 #include <linux/usb/role.h>
20 spin_lock_irqsave(&hsotg->lock, flags); in dwc2_ovr_init()
30 spin_unlock_irqrestore(&hsotg->lock, flags); in dwc2_ovr_init()
37 /* Check if A-Session is already in the right state */ in dwc2_ovr_avalid()
40 return -EALREADY; in dwc2_ovr_avalid()
55 /* Check if B-Session is already in the right state */ in dwc2_ovr_bvalid()
58 return -EALREADY; in dwc2_ovr_bvalid()
69 static int dwc2_drd_role_sw_set(struct usb_role_switch *sw, enum usb_role role) in dwc2_drd_role_sw_set() argument
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