On Fri, Sep 09, 2016 at 04:48:32PM +0300, Heikki Krogerus wrote: > The purpose of USB Type-C connector class is to provide > unified interface for the user space to get the status and > basic information about USB Type-C connectors on a system, > control over data role swapping, and when the port supports > USB Power Delivery, also control over power role swapping > and Alternate Modes. > > Signed-off-by: Heikki Krogerus <heikki.krogerus@xxxxxxxxxxxxxxx> Reviewed-by: Guenter Roeck <linux@xxxxxxxxxxxx> Tested-by: Guenter Roeck <linux@xxxxxxxxxxxx> > --- > Documentation/ABI/testing/sysfs-class-typec | 218 ++++++ > Documentation/usb/typec.txt | 103 +++ > MAINTAINERS | 9 + > drivers/usb/Kconfig | 2 + > drivers/usb/Makefile | 2 + > drivers/usb/typec/Kconfig | 7 + > drivers/usb/typec/Makefile | 1 + > drivers/usb/typec/typec.c | 1075 +++++++++++++++++++++++++++ > include/linux/usb/typec.h | 252 +++++++ > 9 files changed, 1669 insertions(+) > create mode 100644 Documentation/ABI/testing/sysfs-class-typec > create mode 100644 Documentation/usb/typec.txt > create mode 100644 drivers/usb/typec/Kconfig > create mode 100644 drivers/usb/typec/Makefile > create mode 100644 drivers/usb/typec/typec.c > create mode 100644 include/linux/usb/typec.h > > diff --git a/Documentation/ABI/testing/sysfs-class-typec b/Documentation/ABI/testing/sysfs-class-typec > new file mode 100644 > index 0000000..dcca6bd > --- /dev/null > +++ b/Documentation/ABI/testing/sysfs-class-typec > @@ -0,0 +1,218 @@ > +USB Type-C port devices (eg. /sys/class/typec/usbc0/) > + > +What: /sys/class/typec/<port>/current_data_role > +Date: June 2016 > +Contact: Heikki Krogerus <heikki.krogerus@xxxxxxxxxxxxxxx> > +Description: > + The current USB data role the port is operating in. This > + attribute can be used for requesting data role swapping on the > + port. Swapping is supported as synchronous operation, so > + write(2) to the attribute will not return until the operation > + has finished. The attribute is notified about role changes so > + that poll(2) on the attribute wakes up. > + > + Valid values: > + - host > + - device > + > +What: /sys/class/typec/<port>/current_power_role > +Date: June 2016 > +Contact: Heikki Krogerus <heikki.krogerus@xxxxxxxxxxxxxxx> > +Description: > + The current power role of the port. This attribute can be used > + to request power role swap on the port when the port supports > + USB Power Delivery. Swapping is supported as synchronous > + operation, so write(2) to the attribute will not return until > + the operation has finished. The attribute is notified about role > + changes so that poll(2) on the attribute wakes up. > + > + Valid values: > + - source > + - sink > + > +What: /sys/class/typec/<port>/vconn_source > +Date: June 2016 > +Contact: Heikki Krogerus <heikki.krogerus@xxxxxxxxxxxxxxx> > +Description: > + Shows is the port VCONN Source. This attribute can be used to > + request VCONN swap to change the VCONN Source during connection > + when both the port and the partner support USB Power Delivery. > + Swapping is supported as synchronous operation, so write(2) to > + the attribute will not return until the operation has finished. > + The attribute is notified about VCONN source changes so that > + poll(2) on the attribute wakes up. > + > + Valid values are: > + - 0 when the port is not the VCONN Source > + - 1 when the port is the VCONN Source > + > +What: /sys/class/typec/<port>/power_operation_mode > +Date: June 2016 > +Contact: Heikki Krogerus <heikki.krogerus@xxxxxxxxxxxxxxx> > +Description: > + Shows the current power operational mode the port is in. > + > + Valid values: > + - USB - Normal power levels defined in USB specifications > + - BC1.2 - Power levels defined in Battery Charging Specification > + v1.2 > + - USB Type-C 1.5A - Higher 1.5A current defined in USB Type-C > + specification. > + - USB Type-C 3.0A - Higher 3A current defined in USB Type-C > + specification. > + - USB Power Delivery - The voltages and currents defined in USB > + Power Delivery specification > + > +What: /sys/class/typec/<port>/preferred_role > +Date: June 2016 > +Contact: Heikki Krogerus <heikki.krogerus@xxxxxxxxxxxxxxx> > +Description: > + The user space can notify the driver about the preferred role. > + It should be handled as enabling of Try.SRC or Try.SNK, as > + defined in USB Type-C specification, in the port drivers. By > + default there is no preferred role. > + > + Valid values: > + - source > + - sink > + - none - to remove preference > + > +What: /sys/class/typec/<port>/supported_accessory_modes > +Date: June 2016 > +Contact: Heikki Krogerus <heikki.krogerus@xxxxxxxxxxxxxxx> > +Description: > + Lists the Accessory Modes, defined in the USB Type-C > + specification, the port supports. > + > +What: /sys/class/typec/<port>/supported_data_roles > +Date: June 2016 > +Contact: Heikki Krogerus <heikki.krogerus@xxxxxxxxxxxxxxx> > +Description: > + Lists the USB data roles the port is capable of supporting. > + > + Valid values: > + - device > + - host > + - device, host (DRD as defined in USB Type-C specification v1.2) > + > +What: /sys/class/typec/<port>/supported_power_roles > +Date: June 2016 > +Contact: Heikki Krogerus <heikki.krogerus@xxxxxxxxxxxxxxx> > +Description: > + Lists the power roles the port is capable of supporting. > + > + Valid values: > + - source > + - sink > + - source, sink (DRP as defined in USB Type-C specification v1.2) > + > +What: /sys/class/typec/<port>/supports_usb_power_delivery > +Date: June 2016 > +Contact: Heikki Krogerus <heikki.krogerus@xxxxxxxxxxxxxxx> > +Description: > + Shows if the port supports USB Power Delivery. > + - 1 if USB Power Delivery is supported > + - 0 when it's not > + > + > +USB Type-C partner devices (eg. /sys/class/typec/usbc0-partner/) > + > +What: /sys/class/typec/<port>-partner/accessory_mode > +Date: June 2016 > +Contact: Heikki Krogerus <heikki.krogerus@xxxxxxxxxxxxxxx> > +Description: > + Shows the Accessory Mode name, or "no" when the partner does not > + support Accesory Modes. The Accessory Modes are defined in USB > + Type-C Specification. > + > +What: /sys/class/typec/<port>-partner/supports_usb_power_delivery > +Date: June 2016 > +Contact: Heikki Krogerus <heikki.krogerus@xxxxxxxxxxxxxxx> > +Description: > + Shows if the partner supports USB Power Delivery: > + - 0 when USB Power Delivery is not supported > + - 1 when USB Power Delivery is supported > + > + > +USB Type-C cable devices (eg. /sys/class/typec/usbc0-cable/) > + > +Note: Electronically Marked Cables will have a device also for one cable plug > +(eg. /sys/class/typec/usbc0-plug0). If the cable is active and has also SOP > +Double Prime controller (USB Power Deliver specification ch. 2.4) it will have > +second device also for the other plug. Both plugs may have their alternate modes > +as described in USB Type-C and USB Power Delivery specifications. > + > +What: /sys/class/typec/<port>-cable/active > +Date: June 2016 > +Contact: Heikki Krogerus <heikki.krogerus@xxxxxxxxxxxxxxx> > +Description: > + Shows if the cable is active or passive. > + > + Valid values: > + - 0 when the cable is passive > + - 1 when the cable is active > + > +What: /sys/class/typec/<port>-cable/plug_type > +Date: June 2016 > +Contact: Heikki Krogerus <heikki.krogerus@xxxxxxxxxxxxxxx> > +Description: > + Shows type of the plug on the cable: > + - Type-A - Standard A > + - Type-B - Standard B > + - Type-C - USB Type-C > + - Captive - Non-standard > + > +What: /sys/class/typec/<port>-cable/supports_usb_power_delivery > +Date: June 2016 > +Contact: Heikki Krogerus <heikki.krogerus@xxxxxxxxxxxxxxx> > +Description: > + Shows if the cable supports USB Power Delivery: > + - 0 when USB Power Delivery is not supported > + - 1 when USB Power Delivery is supported > + > + > +Alternate Mode devices (For example, > +/sys/class/typec/usbc0-partner/usbc0-partner.svid:xxxx/). The ports, partners > +and cable plugs can have alternate modes. > + > +What: /sys/class/typec/<dev>/<dev>.svid:<svid>/<mode>/active > +Date: June 2016 > +Contact: Heikki Krogerus <heikki.krogerus@xxxxxxxxxxxxxxx> > +Description: > + Shows if the mode is active or not. The attribute can be used > + for entering/exiting the mode with partners and cable plugs, and > + with the port alternate modes it can be used for disabling > + support for specific alternate modes. Entering/exiting modes is > + supported as synchronous operation so write(2) to the attribute > + does not return until the enter/exit mode operation has > + finished. The attribute is notified when the mode is > + entered/exited so poll(2) on the attribute wakes up. > + > + Valid values: > + - 0 when the mode is deactive > + - 1 when the mode is active > + > +What: /sys/class/typec/<dev>/<dev>.svid:<svid>/<mode>/description > +Date: June 2016 > +Contact: Heikki Krogerus <heikki.krogerus@xxxxxxxxxxxxxxx> > +Description: > + Shows description of the mode. The description is optional for > + the drivers, just like with the Billboard Devices. > + > +What: /sys/class/typec/<dev>/<dev>.svid:<svid>/<mode>/vdo > +Date: June 2016 > +Contact: Heikki Krogerus <heikki.krogerus@xxxxxxxxxxxxxxx> > +Description: > + Shows the VDO in hexadecimal returned from the Discover Modes > + command. > + > +What: /sys/class/typec/<port>/<port>.svid:<svid>/<mode>/supported_roles > +Date: June 2016 > +Contact: Heikki Krogerus <heikki.krogerus@xxxxxxxxxxxxxxx> > +Description: > + Shows the roles, source or sink, the mode is supported with. > + > + This attribute is available for the devices describing the > + alternate modes a port supports, and it will not be exposed with > + the devices presenting the alternate modes the partners or cable > + plugs support. > diff --git a/Documentation/usb/typec.txt b/Documentation/usb/typec.txt > new file mode 100644 > index 0000000..7095a2a > --- /dev/null > +++ b/Documentation/usb/typec.txt > @@ -0,0 +1,103 @@ > +USB Type-C connector class > +========================== > + > +Introduction > +------------ > +The typec class is meant for describing the USB Type-C ports in a system to the > +user space in unified fashion. The class is designed to provide nothing else > +except the user space interface implementation in hope that it can be utilized > +on as many platforms as possible. > + > +The platforms are expected to register every USB Type-C port they have with the > +class. In a normal case the registration will be done by a USB Type-C or PD PHY > +driver, but it may be a driver for firmware interface such as UCSI, driver for > +USB PD controller or even driver for Thunderbolt3 controller. This document > +considers the component registering the USB Type-C ports with the class as "port > +driver". > + > +On top of showing the capabilities, the class also offer the user space control > +over the roles and alternate modes they support when the port driver is capable > +of supporting those features. > + > +The class provides an API for the port drivers described in this document. The > +attributes are described in Documentation/ABI/testing/sysfs-class-typec. > + > + > +Interface > +--------- > +Every port will be presented as its own device under /sys/class/typec/. The > +first port will be named "usbc0", the second "usbc1" and so on. > + > +When connected, the partner will be presented also as its own device under > +/sys/class/typec/. The parent of the partner device will always be the port. The > +partner attached to port "usbc0" will be named "usbc0-partner". Full path to the > +device would be /sys/class/typec/usb0/usb0-partner/. > + > +The cable and the two plugs on it may also be optionally presented as their own > +devices under /sys/class/typec/. The cable attached to the port "usbc0" port > +will be named usbc0-cable and the plug on the SOP Prime end (see USB Power > +Delivery Specification ch. 2.4) will be named "usbc-plug0" and on the SOP Double > +Prime end "usbc0-plug1". The parent of a cable will always be the port, and the > +parent of the cable plugs will always be the cable. > + > +If the port, partner or cable plug support Alternate Modes, every Alternate Mode > +SVID will have their own device describing them. The Alternate Modes will not be > +attached to the typec class. For the port's "usbc0" partner, the Alternate Modes > +would have devices presented under /sys/class/typec/usbc0-partner/. Every mode > +that is supported will have its own group under the Alternate Mode device named > +"mode<id>". For example /sys/class/typec/usbc0/usbc0.svid:xxxx/mode0/. The > +requests for entering/exiting the modes happens with the "active" attribute in > +that group. > + > + > +API > +--- > + > +* Registering the ports > + > +The port drivers will describe every Type-C port they control with struct > +typec_capability data structure, and register them with the following API: > + > +struct typec_port *typec_register_port(struct device *dev, > + const struct typec_capability *cap); > + > +The class will provide handle to struct typec_port on success and ERR_PTR on > +failure. The un-registration of the port happens with the following API: > + > +void typec_unregister_port(struct typec_port *port); > + > + > +* Notifications > + > +When connection happens on a port, the port driver fills struct typec_connection > +which is passed to the class. The class provides the following API for reporting > +connection/disconnection: > + > +int typec_connect(struct typec_port *port, struct typec_connection *); > +void typec_disconnect(struct typec_port *); > + > +When the partner end has executed a role change, the port driver uses the > +following APIs to report it to the class: > + > +void typec_set_data_role(struct typec_port *, enum typec_data_role); > +void typec_set_pwr_role(struct typec_port *, enum typec_role); > +void typec_set_vconn_role(struct typec_port *, enum typec_role); > +void typec_set_pwr_opmode(struct typec_port *, enum typec_pwr_opmode); > + > + > +* Alternate Modes > + > +After connection, the port drivers register the alternate modes the partner > +and/or cable plugs support. And before reporting disconnection, the port driver > +_must_ unregister all the alternate modes registered for the partner and cable > +plugs. The API takes the struct device of the partner or the cable plug as > +parameter: > + > +int typec_register_altmodes(struct device *, struct typec_altmode *); > +void typec_unregister_altmodes(struct device *); > + > +When the partner end enters or exits the modes, the port driver needs to notify > +the class with the following API: > + > +void typec_altmode_update_active(struct typec_altmode *alt, int mode, > + bool active); > diff --git a/MAINTAINERS b/MAINTAINERS > index 59b0ed2..a7f86d1 100644 > --- a/MAINTAINERS > +++ b/MAINTAINERS > @@ -12407,6 +12407,15 @@ F: drivers/usb/ > F: include/linux/usb.h > F: include/linux/usb/ > > +USB TYPEC SUBSYSTEM > +M: Heikki Krogerus <heikki.krogerus@xxxxxxxxxxxxxxx> > +L: linux-usb@xxxxxxxxxxxxxxx > +S: Maintained > +F: Documentation/ABI/testing/sysfs-class-typec > +F: Documentation/usb/typec.txt > +F: drivers/usb/typec/ > +F: include/linux/usb/typec.h > + > USB UHCI DRIVER > M: Alan Stern <stern@xxxxxxxxxxxxxxxxxxx> > L: linux-usb@xxxxxxxxxxxxxxx > diff --git a/drivers/usb/Kconfig b/drivers/usb/Kconfig > index 8689dcb..f42a3d3 100644 > --- a/drivers/usb/Kconfig > +++ b/drivers/usb/Kconfig > @@ -150,6 +150,8 @@ source "drivers/usb/phy/Kconfig" > > source "drivers/usb/gadget/Kconfig" > > +source "drivers/usb/typec/Kconfig" > + > config USB_LED_TRIG > bool "USB LED Triggers" > depends on LEDS_CLASS && USB_COMMON && LEDS_TRIGGERS > diff --git a/drivers/usb/Makefile b/drivers/usb/Makefile > index dca7856..51e381e 100644 > --- a/drivers/usb/Makefile > +++ b/drivers/usb/Makefile > @@ -61,3 +61,5 @@ obj-$(CONFIG_USB_GADGET) += gadget/ > obj-$(CONFIG_USB_COMMON) += common/ > > obj-$(CONFIG_USBIP_CORE) += usbip/ > + > +obj-$(CONFIG_TYPEC) += typec/ > diff --git a/drivers/usb/typec/Kconfig b/drivers/usb/typec/Kconfig > new file mode 100644 > index 0000000..b229fb9 > --- /dev/null > +++ b/drivers/usb/typec/Kconfig > @@ -0,0 +1,7 @@ > + > +menu "USB PD and Type-C drivers" > + > +config TYPEC > + tristate > + > +endmenu > diff --git a/drivers/usb/typec/Makefile b/drivers/usb/typec/Makefile > new file mode 100644 > index 0000000..1012a8b > --- /dev/null > +++ b/drivers/usb/typec/Makefile > @@ -0,0 +1 @@ > +obj-$(CONFIG_TYPEC) += typec.o > diff --git a/drivers/usb/typec/typec.c b/drivers/usb/typec/typec.c > new file mode 100644 > index 0000000..8fa729e > --- /dev/null > +++ b/drivers/usb/typec/typec.c > @@ -0,0 +1,1075 @@ > +/* > + * USB Type-C Connector Class > + * > + * Copyright (C) 2016, Intel Corporation > + * Author: Heikki Krogerus <heikki.krogerus@xxxxxxxxxxxxxxx> > + * > + * This program is free software; you can redistribute it and/or modify > + * it under the terms of the GNU General Public License version 2 as > + * published by the Free Software Foundation. > + */ > + > +#include <linux/device.h> > +#include <linux/module.h> > +#include <linux/slab.h> > +#include <linux/usb/typec.h> > + > +struct typec_port { > + unsigned int id; > + struct device dev; > + > + int prefer_role; > + > + enum typec_data_role data_role; > + enum typec_role pwr_role; > + enum typec_role vconn_role; > + enum typec_pwr_opmode pwr_opmode; > + > + struct typec_partner *partner; > + struct typec_cable *cable; > + > + unsigned int connected:1; > + > + const struct typec_capability *cap; > +}; > + > +#define to_typec_port(p) container_of(p, struct typec_port, dev) > + > +static DEFINE_IDA(typec_index_ida); > + > +static struct class typec_class = { > + .name = "typec", > +}; > + > +static const char * const typec_accessory_modes[] = { > + [TYPEC_ACCESSORY_NONE] = "no", > + [TYPEC_ACCESSORY_AUDIO] = "Audio Adapter Accessory Mode", > + [TYPEC_ACCESSORY_DEBUG] = "Debug Accessory Mode", > +}; > + > +static int sysfs_strmatch(const char * const *array, size_t n, const char *str) > +{ > + const char *item; > + int index; > + > + for (index = 0; index < n; index++) { > + item = array[index]; > + if (!item) > + break; > + if (sysfs_streq(item, str)) > + return index; > + } > + > + return -EINVAL; > +} > + > +/* ------------------------------------------------------------------------- */ > +/* Type-C Partners */ > + > +static void typec_dev_release(struct device *dev) > +{ > +} > + > +static ssize_t partner_usb_pd_show(struct device *dev, > + struct device_attribute *attr, char *buf) > +{ > + struct typec_partner *p = container_of(dev, struct typec_partner, dev); > + > + return sprintf(buf, "%d\n", p->usb_pd); > +} > + > +static struct device_attribute dev_attr_partner_usb_pd = { > + .attr = { > + .name = "supports_usb_power_delivery", > + .mode = S_IRUGO, > + }, > + .show = partner_usb_pd_show, > +}; > + > +static ssize_t > +partner_accessory_mode_show(struct device *dev, struct device_attribute *attr, > + char *buf) > +{ > + struct typec_partner *p = container_of(dev, struct typec_partner, dev); > + > + return sprintf(buf, "%s\n", typec_accessory_modes[p->accessory]); > +} > + > +static struct device_attribute dev_attr_partner_accessory = { > + .attr = { > + .name = "accessory_mode", > + .mode = S_IRUGO, > + }, > + .show = partner_accessory_mode_show, > +}; > + > +static struct attribute *typec_partner_attrs[] = { > + &dev_attr_partner_accessory.attr, > + &dev_attr_partner_usb_pd.attr, > + NULL > +}; > + > +static struct attribute_group typec_partner_group = { > + .attrs = typec_partner_attrs, > +}; > + > +static const struct attribute_group *typec_partner_groups[] = { > + &typec_partner_group, > + NULL > +}; > + > +static struct device_type typec_partner_dev_type = { > + .name = "typec_partner_device", > + .groups = typec_partner_groups, > + .release = typec_dev_release, > +}; > + > +static int > +typec_add_partner(struct typec_port *port, struct typec_partner *partner) > +{ > + struct device *dev = &partner->dev; > + int ret; > + > + dev->class = &typec_class; > + dev->parent = &port->dev; > + dev->type = &typec_partner_dev_type; > + dev_set_name(dev, "%s-partner", dev_name(&port->dev)); > + > + ret = device_register(dev); > + if (ret) { > + put_device(dev); > + return ret; > + } > + > + port->partner = partner; > + return 0; > +} > + > +static void typec_remove_partner(struct typec_port *port) > +{ > + WARN_ON(port->partner->alt_modes); > + device_unregister(&port->partner->dev); > +} > + > +/* ------------------------------------------------------------------------- */ > +/* Type-C Cable Plugs */ > + > +static struct device_type typec_plug_dev_type = { > + .name = "typec_plug_device", > + .release = typec_dev_release, > +}; > + > +static int > +typec_add_plug(struct typec_port *port, struct typec_plug *plug) > +{ > + struct device *dev = &plug->dev; > + char name[8]; > + int ret; > + > + sprintf(name, "plug%d", plug->index); > + > + dev->class = &typec_class; > + dev->parent = &port->cable->dev; > + dev->type = &typec_plug_dev_type; > + dev_set_name(dev, "%s-%s", dev_name(&port->dev), name); > + > + ret = device_register(dev); > + if (ret) { > + put_device(dev); > + return ret; > + } > + > + return 0; > +} > + > +static void typec_remove_plug(struct typec_plug *plug) > +{ > + WARN_ON(plug->alt_modes); > + device_unregister(&plug->dev); > +} > + > +/* Type-C Cables */ > + > +static ssize_t > +cable_active_show(struct device *dev, struct device_attribute *attr, char *buf) > +{ > + struct typec_cable *cable = container_of(dev, struct typec_cable, dev); > + > + return sprintf(buf, "%d\n", cable->active); > +} > + > +static struct device_attribute dev_attr_cable_active = { > + .attr = { > + .name = "active", > + .mode = S_IRUGO, > + }, > + .show = cable_active_show, > +}; > + > +static ssize_t cable_usb_pd_show(struct device *dev, > + struct device_attribute *attr, char *buf) > +{ > + struct typec_cable *cable = container_of(dev, struct typec_cable, dev); > + > + return sprintf(buf, "%d\n", cable->usb_pd); > +} > + > +static struct device_attribute dev_attr_cable_usb_pd = { > + .attr = { > + .name = "supports_usb_power_delivery", > + .mode = S_IRUGO, > + }, > + .show = cable_usb_pd_show, > +}; > + > +static const char * const typec_plug_types[] = { > + [USB_PLUG_NONE] = "unknown", > + [USB_PLUG_TYPE_A] = "Type-A", > + [USB_PLUG_TYPE_B] = "Type-B", > + [USB_PLUG_TYPE_C] = "Type-C", > + [USB_PLUG_CAPTIVE] = "Captive", > +}; > + > +static ssize_t cable_plug_type_show(struct device *dev, > + struct device_attribute *attr, char *buf) > +{ > + struct typec_cable *cable = container_of(dev, struct typec_cable, dev); > + > + return sprintf(buf, "%s\n", typec_plug_types[cable->type]); > +} > + > +static struct device_attribute dev_attr_plug_type = { > + .attr = { > + .name = "plug_type", > + .mode = S_IRUGO, > + }, > + .show = cable_plug_type_show, > +}; > + > +static struct attribute *typec_cable_attrs[] = { > + &dev_attr_cable_active.attr, > + &dev_attr_cable_usb_pd.attr, > + &dev_attr_plug_type.attr, > + NULL > +}; > + > +static struct attribute_group typec_cable_group = { > + .attrs = typec_cable_attrs, > +}; > + > +static const struct attribute_group *typec_cable_groups[] = { > + &typec_cable_group, > + NULL > +}; > + > +static struct device_type typec_cable_dev_type = { > + .name = "typec_cable_device", > + .groups = typec_cable_groups, > + .release = typec_dev_release, > +}; > + > +static int typec_add_cable(struct typec_port *port, struct typec_cable *cable) > +{ > + struct device *dev = &cable->dev; > + int ret; > + > + dev->class = &typec_class; > + dev->parent = &port->dev; > + dev->type = &typec_cable_dev_type; > + dev_set_name(dev, "%s-cable", dev_name(&port->dev)); > + > + ret = device_register(dev); > + if (ret) { > + put_device(dev); > + return ret; > + } > + > + /* Plug1 */ > + if (!cable->usb_pd) > + return 0; > + > + cable->plug[0].index = 1; > + ret = typec_add_plug(port, &cable->plug[0]); > + if (ret) { > + device_unregister(dev); > + return ret; > + } > + > + /* Plug2 */ > + if (!cable->active || !cable->sop_pp_controller) > + return 0; > + > + cable->plug[1].index = 2; > + ret = typec_add_plug(port, &cable->plug[1]); > + if (ret) { > + typec_remove_plug(&cable->plug[0]); > + device_unregister(dev); > + return ret; > + } > + > + port->cable = cable; > + return 0; > +} > + > +static void typec_remove_cable(struct typec_port *port) > +{ > + if (port->cable->active) { > + typec_remove_plug(&port->cable->plug[0]); > + if (port->cable->sop_pp_controller) > + typec_remove_plug(&port->cable->plug[1]); > + } > + device_unregister(&port->cable->dev); > +} > + > +/* ------------------------------------------------------------------------- */ > +/* API for the port drivers */ > + > +static void typec_init_roles(struct typec_port *port) > +{ > + if (port->prefer_role < 0) > + return; > + > + if (port->prefer_role == TYPEC_SOURCE) { > + port->data_role = TYPEC_HOST; > + port->pwr_role = TYPEC_SOURCE; > + port->vconn_role = TYPEC_SOURCE; > + } else { > + /* Device mode as default also by default with DRP ports */ > + port->data_role = TYPEC_DEVICE; > + port->pwr_role = TYPEC_SINK; > + port->vconn_role = TYPEC_SINK; > + } > +} > + > +int typec_connect(struct typec_port *port, struct typec_connection *con) > +{ > + int ret; > + > + if (!con->partner && !con->cable) > + return -EINVAL; > + > + port->connected = 1; > + port->data_role = con->data_role; > + port->pwr_role = con->pwr_role; > + port->vconn_role = con->vconn_role; > + port->pwr_opmode = con->pwr_opmode; > + > + kobject_uevent(&port->dev.kobj, KOBJ_CHANGE); > + > + if (con->cable) { > + ret = typec_add_cable(port, con->cable); > + if (ret) > + return ret; > + } > + > + if (con->partner) { > + ret = typec_add_partner(port, con->partner); > + if (ret) { > + if (con->cable) > + typec_remove_cable(port); > + return ret; > + } > + } > + > + return 0; > +} > +EXPORT_SYMBOL_GPL(typec_connect); > + > +void typec_disconnect(struct typec_port *port) > +{ > + if (port->partner) > + typec_remove_partner(port); > + > + if (port->cable) > + typec_remove_cable(port); > + > + port->connected = 0; > + port->partner = NULL; > + port->cable = NULL; > + > + port->pwr_opmode = TYPEC_PWR_MODE_USB; > + > + typec_init_roles(port); > + > + kobject_uevent(&port->dev.kobj, KOBJ_CHANGE); > +} > +EXPORT_SYMBOL_GPL(typec_disconnect); > + > +/* --------------------------------------- */ > +/* Driver callbacks to report role updates */ > + > +void typec_set_data_role(struct typec_port *port, enum typec_data_role role) > +{ > + port->data_role = role; > + sysfs_notify(&port->dev.kobj, NULL, "current_data_role"); > +} > +EXPORT_SYMBOL(typec_set_data_role); > + > +void typec_set_pwr_role(struct typec_port *port, enum typec_role role) > +{ > + port->pwr_role = role; > + sysfs_notify(&port->dev.kobj, NULL, "current_power_role"); > +} > +EXPORT_SYMBOL(typec_set_pwr_role); > + > +void typec_set_vconn_role(struct typec_port *port, enum typec_role role) > +{ > + port->vconn_role = role; > + sysfs_notify(&port->dev.kobj, NULL, "current_vconn_role"); > +} > +EXPORT_SYMBOL(typec_set_vconn_role); > + > +void typec_set_pwr_opmode(struct typec_port *port, > + enum typec_pwr_opmode opmode) > +{ > + port->pwr_opmode = opmode; > + sysfs_notify(&port->dev.kobj, NULL, "power_operation_mode"); > +} > +EXPORT_SYMBOL(typec_set_pwr_opmode); > + > +/* -------------------------------- */ > +/* Alternate Modes */ > + > +/* > + * typec_altmode_update_active - Notify about Enter/Exit mode > + * @alt: Handle to the Alternate Mode > + * @mode: Mode id > + * @active: True when the mode has been enterred > + */ > +void typec_altmode_update_active(struct typec_altmode *alt, int mode, > + bool active) > +{ > + struct typec_mode *m = alt->modes + mode; > + char dir[6]; > + > + m->active = active; > + snprintf(dir, 6, "mode%d", mode); > + sysfs_notify(&alt->dev.kobj, dir, "active"); > +} > +EXPORT_SYMBOL(typec_altmode_update_active); > + > +static struct device_type typec_port_dev_type; > + > +/* > + * typec_altmode2port - Alternate Mode to USB Type-C port > + * @alt: The Alternate Mode > + * > + * Returns the port that the cable plug or partner with @alt is connected to. > + */ > +struct typec_port *typec_altmode2port(struct typec_altmode *alt) > +{ > + if (alt->dev.parent->type == &typec_plug_dev_type) > + return to_typec_port(alt->dev.parent->parent->parent); > + if (alt->dev.parent->type == &typec_partner_dev_type) > + return to_typec_port(alt->dev.parent->parent); > + if (alt->dev.parent->type == &typec_port_dev_type) > + return to_typec_port(alt->dev.parent); > + > + return NULL; > +} > +EXPORT_SYMBOL_GPL(typec_altmode2port); > + > +static void typec_altmode_release(struct device *dev) > +{ > + struct typec_altmode *alt = to_altmode(dev); > + > + kfree(alt->mode_groups); > +} > + > +static ssize_t > +typec_altmode_vdo_show(struct device *dev, struct device_attribute *attr, > + char *buf) > +{ > + struct typec_mode *mode = container_of(attr, struct typec_mode, > + vdo_attr); > + > + return sprintf(buf, "0x%08x\n", mode->vdo); > +} > + > +static ssize_t > +typec_altmode_desc_show(struct device *dev, struct device_attribute *attr, > + char *buf) > +{ > + struct typec_mode *mode = container_of(attr, struct typec_mode, > + desc_attr); > + > + return sprintf(buf, "%s\n", mode->desc ? mode->desc : ""); > +} > + > +static ssize_t > +typec_altmode_active_show(struct device *dev, struct device_attribute *attr, > + char *buf) > +{ > + struct typec_mode *mode = container_of(attr, struct typec_mode, > + active_attr); > + > + return sprintf(buf, "%d\n", mode->active); > +} > + > +static ssize_t > +typec_altmode_active_store(struct device *dev, struct device_attribute *attr, > + const char *buf, size_t size) > +{ > + struct typec_mode *mode = container_of(attr, struct typec_mode, > + active_attr); > + struct typec_port *port = typec_altmode2port(mode->alt_mode); > + bool activate; > + int ret; > + > + ret = kstrtobool(buf, &activate); > + if (ret) > + return ret; > + > + ret = port->cap->activate_mode(mode->alt_mode, mode->index, activate); > + if (ret) > + return ret; > + > + return size; > +} > + > +static ssize_t > +typec_altmode_roles_show(struct device *dev, struct device_attribute *attr, > + char *buf) > +{ > + struct typec_mode *mode = container_of(attr, struct typec_mode, > + roles_attr); > + ssize_t ret; > + > + switch (mode->roles) { > + case TYPEC_PORT_DFP: > + ret = sprintf(buf, "source\n"); > + break; > + case TYPEC_PORT_UFP: > + ret = sprintf(buf, "sink\n"); > + break; > + case TYPEC_PORT_DRP: > + default: > + ret = sprintf(buf, "source, sink\n"); > + break; > + } > + return ret; > +} > + > +static void typec_init_modes(struct typec_altmode *alt, int is_port) > +{ > + struct typec_mode *mode = alt->modes; > + int i; > + > + for (i = 0; i < alt->n_modes; i++, mode++) { > + mode->alt_mode = alt; > + mode->index = i; > + sprintf(mode->group_name, "mode%d", i); > + > + sysfs_attr_init(&mode->vdo_attr.attr); > + mode->vdo_attr.attr.name = "vdo"; > + mode->vdo_attr.attr.mode = S_IRUGO; > + mode->vdo_attr.show = typec_altmode_vdo_show; > + > + sysfs_attr_init(&mode->desc_attr.attr); > + mode->desc_attr.attr.name = "description"; > + mode->desc_attr.attr.mode = S_IRUGO; > + mode->desc_attr.show = typec_altmode_desc_show; > + > + sysfs_attr_init(&mode->active_attr.attr); > + mode->active_attr.attr.name = "active"; > + mode->active_attr.attr.mode = S_IWUSR | S_IRUGO; > + mode->active_attr.show = typec_altmode_active_show; > + mode->active_attr.store = typec_altmode_active_store; > + > + mode->attrs[0] = &mode->vdo_attr.attr; > + mode->attrs[1] = &mode->desc_attr.attr; > + mode->attrs[2] = &mode->active_attr.attr; > + > + /* With ports, list the roles that the mode is supported with */ > + if (is_port) { > + sysfs_attr_init(&mode->roles_attr.attr); > + mode->roles_attr.attr.name = "supported_roles"; > + mode->roles_attr.attr.mode = S_IRUGO; > + mode->roles_attr.show = typec_altmode_roles_show; > + > + mode->attrs[3] = &mode->roles_attr.attr; > + } > + > + mode->group.attrs = mode->attrs; > + mode->group.name = mode->group_name; > + > + alt->mode_groups[i] = &mode->group; > + } > +} > + > +static int > +typec_add_altmode(struct device *parent, struct typec_altmode *alt, int is_port) > +{ > + struct device *dev = &alt->dev; > + int ret; > + > + alt->mode_groups = kcalloc(alt->n_modes + 1, > + sizeof(struct attibute_group *), GFP_KERNEL); > + if (!alt->mode_groups) > + return -ENOMEM; > + > + typec_init_modes(alt, is_port); > + > + dev->groups = alt->mode_groups; > + dev->release = typec_altmode_release; > + dev->parent = parent; > + /* TODO: if (!is_port) dev->bus = &typec_altmode_bus; */ > + > + dev_set_name(dev, "%s.svid:%04x", dev_name(parent), alt->svid); > + > + ret = device_register(dev); > + if (ret) { > + put_device(dev); > + kfree(alt->mode_groups); > + return ret; > + } > + > + return 0; > +} > + > +static int __typec_register_altmodes(struct device *parent, > + struct typec_altmode *alt_modes, > + int is_port) > +{ > + struct typec_altmode *alt; > + int index; > + int ret; > + > + if (!alt_modes) > + return 0; > + > + for (alt = alt_modes, index = 0; alt->svid; alt++, index++) { > + ret = typec_add_altmode(parent, alt, is_port); > + if (ret) > + goto err; > + } > + > + return 0; > +err: > + for (alt = alt_modes + index; index; alt--, index--) > + device_unregister(&alt->dev); > + > + return ret; > +} > + > +int typec_register_altmodes(struct device *dev, struct typec_altmode *alt_modes) > +{ > + if (dev->type == &typec_partner_dev_type) { > + struct typec_partner *p = container_of(dev, > + struct typec_partner, > + dev); > + p->alt_modes = alt_modes; > + } else if (dev->type == &typec_plug_dev_type) { > + struct typec_plug *p = container_of(dev, struct typec_plug, > + dev); > + p->alt_modes = alt_modes; > + } else { > + return -ENODEV; > + } > + > + return __typec_register_altmodes(dev, alt_modes, false); > +} > +EXPORT_SYMBOL_GPL(typec_register_altmodes); > + > +void typec_unregister_altmodes(struct device *dev) > +{ > + struct typec_altmode *alt_modes = NULL; > + struct typec_altmode *alt; > + > + if (dev->type == &typec_partner_dev_type) { > + struct typec_partner *p = container_of(dev, > + struct typec_partner, > + dev); > + alt_modes = p->alt_modes; > + p->alt_modes = NULL; > + } else if (dev->type == &typec_plug_dev_type) { > + struct typec_plug *p = container_of(dev, struct typec_plug, > + dev); > + alt_modes = p->alt_modes; > + p->alt_modes = NULL; > + } > + > + if (!alt_modes) > + return; > + > + for (alt = alt_modes; alt->svid; alt++) > + device_unregister(&alt->dev); > +} > +EXPORT_SYMBOL_GPL(typec_unregister_altmodes); > + > +/* ------------------------------------------------------------------------- */ > +/* USB Type-C ports */ > + > +static const char * const typec_roles[] = { > + [TYPEC_SINK] = "sink", > + [TYPEC_SOURCE] = "source", > +}; > + > +static const char * const typec_data_roles[] = { > + [TYPEC_DEVICE] = "device", > + [TYPEC_HOST] = "host", > +}; > + > +static ssize_t > +preferred_role_store(struct device *dev, struct device_attribute *attr, > + const char *buf, size_t size) > +{ > + struct typec_port *port = to_typec_port(dev); > + int role; > + int ret; > + > + if (port->cap->type != TYPEC_PORT_DRP) { > + dev_dbg(dev, "Preferred role only supported with DRP ports\n"); > + return -EOPNOTSUPP; > + } > + > + if (!port->cap->try_role) { > + dev_dbg(dev, "Setting preferred role not supported\n"); > + return -EOPNOTSUPP; > + } > + > + role = sysfs_strmatch(typec_roles, ARRAY_SIZE(typec_roles), buf); > + if (role < 0) { > + if (sysfs_streq(buf, "none")) > + role = TYPEC_NO_PREFERRED_ROLE; > + else > + return -EINVAL; > + } > + > + ret = port->cap->try_role(port->cap, role); > + if (ret) > + return ret; > + > + port->prefer_role = role; > + return size; > +} > + > +static ssize_t > +preferred_role_show(struct device *dev, struct device_attribute *attr, > + char *buf) > +{ > + struct typec_port *port = to_typec_port(dev); > + > + if (port->prefer_role < 0) > + return 0; > + > + return sprintf(buf, "%s\n", typec_roles[port->prefer_role]); > +} > +static DEVICE_ATTR_RW(preferred_role); > + > +static ssize_t > +current_data_role_store(struct device *dev, struct device_attribute *attr, > + const char *buf, size_t size) > +{ > + struct typec_port *port = to_typec_port(dev); > + int ret; > + > + if (port->cap->type != TYPEC_PORT_DRP) { > + dev_dbg(dev, "data role swap only supported with DRP ports\n"); > + return -EOPNOTSUPP; > + } > + > + if (!port->cap->dr_set) { > + dev_dbg(dev, "data role swapping not supported\n"); > + return -EOPNOTSUPP; > + } > + > + ret = sysfs_strmatch(typec_data_roles, ARRAY_SIZE(typec_data_roles), > + buf); > + if (ret < 0) > + return ret; > + > + ret = port->cap->dr_set(port->cap, ret); > + if (ret) > + return ret; > + > + return size; > +} > + > +static ssize_t > +current_data_role_show(struct device *dev, struct device_attribute *attr, > + char *buf) > +{ > + struct typec_port *port = to_typec_port(dev); > + > + return sprintf(buf, "%s\n", typec_data_roles[port->data_role]); > +} > +static DEVICE_ATTR_RW(current_data_role); > + > +static ssize_t supported_data_roles_show(struct device *dev, > + struct device_attribute *attr, > + char *buf) > +{ > + struct typec_port *port = to_typec_port(dev); > + > + if (port->cap->type == TYPEC_PORT_DRP) > + return sprintf(buf, "host, device\n"); > + > + return sprintf(buf, "%s\n", typec_data_roles[port->data_role]); > +} > +static DEVICE_ATTR_RO(supported_data_roles); > + > +static ssize_t current_power_role_store(struct device *dev, > + struct device_attribute *attr, > + const char *buf, size_t size) > +{ > + struct typec_port *port = to_typec_port(dev); > + int ret = size; > + > + if (!port->cap->usb_pd) { > + dev_dbg(dev, "power role swap only supported with USB PD\n"); > + return -EOPNOTSUPP; > + } > + > + if (!port->cap->pr_set) { > + dev_dbg(dev, "power role swapping not supported\n"); > + return -EOPNOTSUPP; > + } > + > + if (port->pwr_opmode != TYPEC_PWR_MODE_PD) { > + dev_dbg(dev, "partner unable to swap power role\n"); > + return -EIO; > + } > + > + ret = sysfs_strmatch(typec_roles, ARRAY_SIZE(typec_roles), buf); > + if (ret < 0) > + return ret; > + > + ret = port->cap->pr_set(port->cap, ret); > + if (ret) > + return ret; > + > + return size; > +} > + > +static ssize_t current_power_role_show(struct device *dev, > + struct device_attribute *attr, char *buf) > +{ > + struct typec_port *port = to_typec_port(dev); > + > + return sprintf(buf, "%s\n", typec_roles[port->pwr_role]); > +} > +static DEVICE_ATTR_RW(current_power_role); > + > +static ssize_t supported_power_roles_show(struct device *dev, > + struct device_attribute *attr, > + char *buf) > +{ > + struct typec_port *port = to_typec_port(dev); > + > + if (port->cap->usb_pd || port->cap->type == TYPEC_PORT_DRP) > + return sprintf(buf, "source, sink\n"); > + > + return sprintf(buf, "%s\n", typec_roles[port->pwr_role]); > +} > +static DEVICE_ATTR_RO(supported_power_roles); > + > +static const char * const typec_pwr_opmodes[] = { > + [TYPEC_PWR_MODE_USB] = "USB", > + [TYPEC_PWR_MODE_1_5A] = "USB Type-C 1.5A", > + [TYPEC_PWR_MODE_3_0A] = "USB Type-C 3.0A", > + [TYPEC_PWR_MODE_PD] = "USB Power Delivery", > +}; > + > +static ssize_t power_operation_mode_show(struct device *dev, > + struct device_attribute *attr, > + char *buf) > +{ > + struct typec_port *port = to_typec_port(dev); > + > + return sprintf(buf, "%s\n", typec_pwr_opmodes[port->pwr_opmode]); > +} > +static DEVICE_ATTR_RO(power_operation_mode); > + > +static ssize_t vconn_source_store(struct device *dev, > + struct device_attribute *attr, > + const char *buf, size_t size) > +{ > + struct typec_port *port = to_typec_port(dev); > + enum typec_role role; > + int ret; > + > + if (!port->cap->usb_pd) { > + dev_dbg(dev, "vconn swap only supported with USB PD\n"); > + return -EOPNOTSUPP; > + } > + > + if (!port->cap->vconn_set) { > + dev_dbg(dev, "vconn swapping not supported\n"); > + return -EOPNOTSUPP; > + } > + > + if (sysfs_streq(buf, "1")) > + role = TYPEC_SOURCE; > + else if (sysfs_streq(buf, "0")) > + role = TYPEC_SINK; > + else > + return -EINVAL; > + > + ret = port->cap->vconn_set(port->cap, role); > + if (ret) > + return ret; > + > + return size; > +} > + > +static ssize_t vconn_source_show(struct device *dev, > + struct device_attribute *attr, char *buf) > +{ > + struct typec_port *port = to_typec_port(dev); > + > + return sprintf(buf, "%d\n", port->vconn_role == TYPEC_SOURCE ? 1 : 0); > +} > +static DEVICE_ATTR_RW(vconn_source); > + > +static ssize_t supported_accessory_modes_show(struct device *dev, > + struct device_attribute *attr, > + char *buf) > +{ > + struct typec_port *port = to_typec_port(dev); > + ssize_t ret = 0; > + int i; > + > + if (!port->cap->accessory) > + return 0; > + > + for (i = 0; port->cap->accessory[i]; i++) > + ret += sprintf(buf + ret, "%s\n", > + typec_accessory_modes[port->cap->accessory[i]]); > + return ret; > +} > +static DEVICE_ATTR_RO(supported_accessory_modes); > + > +static ssize_t supports_usb_power_delivery_show(struct device *dev, > + struct device_attribute *attr, > + char *buf) > +{ > + struct typec_port *port = to_typec_port(dev); > + > + return sprintf(buf, "%d\n", port->cap->usb_pd); > +} > +static DEVICE_ATTR_RO(supports_usb_power_delivery); > + > +static struct attribute *typec_attrs[] = { > + &dev_attr_current_power_role.attr, > + &dev_attr_current_data_role.attr, > + &dev_attr_power_operation_mode.attr, > + &dev_attr_preferred_role.attr, > + &dev_attr_supported_accessory_modes.attr, > + &dev_attr_supported_data_roles.attr, > + &dev_attr_supported_power_roles.attr, > + &dev_attr_supports_usb_power_delivery.attr, > + &dev_attr_vconn_source.attr, > + NULL, > +}; > + > +static const struct attribute_group typec_group = { > + .attrs = typec_attrs, > +}; > + > +static const struct attribute_group *typec_groups[] = { > + &typec_group, > + NULL, > +}; > + > +static int typec_uevent(struct device *dev, struct kobj_uevent_env *env) > +{ > + int ret; > + > + ret = add_uevent_var(env, "TYPEC_PORT=%s", dev_name(dev)); > + if (ret) > + dev_err(dev, "failed to add uevent TYPEC_PORT\n"); > + > + return ret; > +} > + > +static void typec_release(struct device *dev) > +{ > + struct typec_port *port = to_typec_port(dev); > + > + ida_simple_remove(&typec_index_ida, port->id); > + kfree(port); > +} > + > +static struct device_type typec_port_dev_type = { > + .name = "typec_port", > + .groups = typec_groups, > + .uevent = typec_uevent, > + .release = typec_release, > +}; > + > +struct typec_port *typec_register_port(struct device *dev, > + const struct typec_capability *cap) > +{ > + struct typec_port *port; > + int ret; > + int id; > + > + port = kzalloc(sizeof(*port), GFP_KERNEL); > + if (!port) > + return ERR_PTR(-ENOMEM); > + > + id = ida_simple_get(&typec_index_ida, 0, 0, GFP_KERNEL); > + if (id < 0) { > + kfree(port); > + return ERR_PTR(id); > + } > + > + port->prefer_role = TYPEC_NO_PREFERRED_ROLE; > + > + port->id = id; > + port->cap = cap; > + port->dev.type = &typec_port_dev_type; > + port->dev.class = &typec_class; > + port->dev.parent = dev; > + dev_set_name(&port->dev, "usbc%d", id); > + > + typec_init_roles(port); > + > + ret = device_register(&port->dev); > + if (ret) > + goto reg_err; > + > + ret = __typec_register_altmodes(&port->dev, cap->alt_modes, true); > + if (ret) > + goto alt_err; > + > + return port; > +alt_err: > + device_unregister(&port->dev); > +reg_err: > + ida_simple_remove(&typec_index_ida, id); > + put_device(&port->dev); > + kfree(port); > + return ERR_PTR(ret); > +} > +EXPORT_SYMBOL_GPL(typec_register_port); > + > +void typec_unregister_port(struct typec_port *port) > +{ > + struct typec_altmode *alt; > + > + WARN_ON(port->connected); > + > + if (port->cap->alt_modes) > + for (alt = port->cap->alt_modes; alt->svid; alt++) > + device_unregister(&alt->dev); > + device_unregister(&port->dev); > +} > +EXPORT_SYMBOL_GPL(typec_unregister_port); > + > +static int __init typec_init(void) > +{ > + return class_register(&typec_class); > +} > +subsys_initcall(typec_init); > + > +static void __exit typec_exit(void) > +{ > + class_unregister(&typec_class); > +} > +module_exit(typec_exit); > + > +MODULE_AUTHOR("Heikki Krogerus <heikki.krogerus@xxxxxxxxxxxxxxx>"); > +MODULE_LICENSE("GPL v2"); > +MODULE_DESCRIPTION("USB Type-C Connector Class"); > diff --git a/include/linux/usb/typec.h b/include/linux/usb/typec.h > new file mode 100644 > index 0000000..dfb8144 > --- /dev/null > +++ b/include/linux/usb/typec.h > @@ -0,0 +1,252 @@ > + > +#ifndef __LINUX_USB_TYPEC_H > +#define __LINUX_USB_TYPEC_H > + > +#include <linux/device.h> > +#include <linux/types.h> > + > +struct typec_port; > + > +enum typec_port_type { > + TYPEC_PORT_DFP, > + TYPEC_PORT_UFP, > + TYPEC_PORT_DRP, > +}; > + > +enum typec_plug_type { > + USB_PLUG_NONE, > + USB_PLUG_TYPE_A, > + USB_PLUG_TYPE_B, > + USB_PLUG_TYPE_C, > + USB_PLUG_CAPTIVE, > +}; > + > +enum typec_data_role { > + TYPEC_DEVICE, > + TYPEC_HOST, > +}; > + > +enum typec_role { > + TYPEC_SINK, > + TYPEC_SOURCE, > +}; > + > +enum typec_pwr_opmode { > + TYPEC_PWR_MODE_USB, > + TYPEC_PWR_MODE_1_5A, > + TYPEC_PWR_MODE_3_0A, > + TYPEC_PWR_MODE_PD, > +}; > + > +enum typec_accessory { > + TYPEC_ACCESSORY_NONE, > + TYPEC_ACCESSORY_AUDIO, > + TYPEC_ACCESSORY_DEBUG, > +}; > + > +/* > + * struct typec_mode - Individual Mode of an Alternate Mode > + * @vdo: VDO returned by Discover Modes USB PD command > + * @desc: Mode description > + * @active: Tells if the mode is currently entered or not > + * @index: Index of the mode > + * @group_name: Name for the sysfs folder in form "mode<index>" > + * @group: The sysfs group (folder) for the mode > + * @attrs: The attributes for the sysfs group > + * @vdo_attr: Device attribute to expose the VDO of the mode > + * @desc_attr: Device attribute to expose the description of the mode > + * @active_attr: Device attribute to expose active of the mode > + * @roles: Only for ports. DRP if the mode is awailable in both roles > + * @roles_attr: Device attribute, only for ports, to expose the supported roles > + * > + * Details about a mode of an Alternate Mode which a connector, cable plug or > + * partner supports. Every mode will have it's own sysfs group. The details are > + * the VDO returned by discover modes command, description for the mode and > + * active flag telling is the mode currently active or not. > + */ > +struct typec_mode { > + u32 vdo; > + char *desc; > + unsigned int active:1; > + /* Only for ports */ > + enum typec_port_type roles; > + > + struct typec_altmode *alt_mode; > + > + int index; > + char group_name[8]; > + struct attribute_group group; > + struct attribute *attrs[5]; > + struct device_attribute vdo_attr; > + struct device_attribute desc_attr; > + struct device_attribute active_attr; > + /* Only for ports */ > + struct device_attribute roles_attr; > +}; > + > +/* > + * struct typec_altmode - USB Type-C Alternate Mode > + * @dev: struct device instance > + * @name: Name for the Alternate Mode (optional) > + * @svid: Standard or Vendor ID > + * @n_modes: Number of modes > + * @modes: Array of modes supported by the Alternat Mode > + * @mode_groups: The modes as attribute groups to be exposed in sysfs > + * > + * Representation of an Alternate Mode that has SVID assigned by USB-IF. The > + * array of modes will list the modes of a particular SVID that are supported by > + * a connector, partner of a cable plug. > + */ > +struct typec_altmode { > + struct device dev; > + char *name; > + > + u16 svid; > + int n_modes; > + struct typec_mode *modes; > + > + const struct attribute_group **mode_groups; > +}; > + > +#define to_altmode(d) container_of(d, struct typec_altmode, dev) > + > +struct typec_port *typec_altmode2port(struct typec_altmode *); > + > +void typec_altmode_update_active(struct typec_altmode *alt, int mode, > + bool active); > + > +int typec_register_altmodes(struct device *, struct typec_altmode *); > +void typec_unregister_altmodes(struct device *); > + > +/* > + * struct typec_plug - USB Type-C Cable Plug > + * @dev: struct device instance > + * @index: 1 for the plug connected to DFP and 2 for the plug connected to UFP > + * @alt_modes: Alternate Modes the cable plug supports (null terminated) > + * > + * Represents USB Type-C Cable Plug. > + */ > +struct typec_plug { > + struct device dev; > + int index; > + struct typec_altmode *alt_modes; > +}; > + > +/* > + * struct typec_cable - USB Type-C Cable > + * @dev: struct device instance > + * @type: The plug type from USB PD Cable VDO > + * @usb_pd: Electronically Marked Cable > + * @active: Is the cable active or passive > + * @sop_pp_controller: Tells whether both cable plugs are configurable or not > + * @plug: The two plugs in the cable. > + * > + * Represents USB Type-C Cable attached to USB Type-C port. Two plugs are > + * created if the cable has SOP Double Prime controller as defined in USB PD > + * specification. Otherwise only one will be created if the cable is active. For > + * passive cables no plugs are created. > + */ > +struct typec_cable { > + struct device dev; > + enum typec_plug_type type; > + u32 vdo; > + unsigned int usb_pd:1; > + unsigned int active:1; > + unsigned int sop_pp_controller:1; > + > + struct typec_plug plug[2]; > +}; > + > +/* > + * struct typec_partner - USB Type-C Partner > + * @dev: struct device instance > + * @type: Normal USB device, charger, Alternate Mode or Accessory > + * @usb_pd: USB Power Delivery support > + * @vdo: VDO returned by Discover Identity USB PD command > + * @alt_modes: Alternate Modes the partner supports (null terminated) > + * > + * Details about a partner that is attached to USB Type-C port. > + */ > +struct typec_partner { > + struct device dev; > + unsigned int usb_pd:1; > + u32 vdo; > + enum typec_accessory accessory; > + struct typec_altmode *alt_modes; > +}; > + > +/* > + * struct typec_capability - USB Type-C Port Capabilities > + * @role: DFP (Host-only), UFP (Device-only) or DRP (Dual Role) > + * @usb_pd: USB Power Delivery support > + * @accessory: Supported Accessory Modes (NULL terminated array) > + * @alt_modes: Alternate Modes the connector supports (NULL terminated) > + * @try_role: Set data role preference for DRP port > + * @dr_set: Set Data Role > + * @pr_set: Set Power Role > + * @vconn_set: Set VCONN Role > + * @activate_mode: Enter/exit given Alternate Mode > + * > + * Static capabilities of a single USB Type-C port. > + */ > +struct typec_capability { > + enum typec_port_type type; > + unsigned int usb_pd:1; > + enum typec_accessory *accessory; > + struct typec_altmode *alt_modes; > + > + int (*try_role)(const struct typec_capability *, > + int role); > + > + int (*dr_set)(const struct typec_capability *, > + enum typec_data_role); > + int (*pr_set)(const struct typec_capability *, > + enum typec_role); > + int (*vconn_set)(const struct typec_capability *, > + enum typec_role); > + > + int (*activate_mode)(struct typec_altmode *, > + int mode, int activate); > +}; > + > +/* Specific to try_role(). Indicates the user want's to clear the preference. */ > +#define TYPEC_NO_PREFERRED_ROLE (-1) > + > +/* > + * struct typec_connection - Details about USB Type-C port connection event > + * @partner: The attached partner > + * @cable: The attached cable > + * @data_role: Initial USB data role (host or device) > + * @pwr_role: Initial Power role (source or sink) > + * @vconn_role: Initial VCONN role (source or sink) > + * @pwr_opmode: The power mode of the connection > + * > + * All the relevant details about a connection event. Wrapper that is passed to > + * typec_connect(). The context is copied when typec_connect() is called and the > + * structure is not used for anything else. > + */ > +struct typec_connection { > + struct typec_partner *partner; > + struct typec_cable *cable; > + > + enum typec_data_role data_role; > + enum typec_role pwr_role; > + enum typec_role vconn_role; > + enum typec_pwr_opmode pwr_opmode; > +}; > + > +struct typec_port *typec_register_port(struct device *dev, > + const struct typec_capability *cap); > +void typec_unregister_port(struct typec_port *port); > + > +int typec_connect(struct typec_port *port, struct typec_connection *con); > +void typec_disconnect(struct typec_port *port); > + > +/* Callbacks from driver */ > + > +void typec_set_data_role(struct typec_port *, enum typec_data_role); > +void typec_set_pwr_role(struct typec_port *, enum typec_role); > +void typec_set_vconn_role(struct typec_port *, enum typec_role); > +void typec_set_pwr_opmode(struct typec_port *, enum typec_pwr_opmode); > + > +#endif /* __LINUX_USB_TYPEC_H */ > -- > 2.9.3 > -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html