usb: typec: ucsi: Implement ChromeOS UCSI driver

Implementation of a UCSI transport driver for ChromeOS.
This driver will be loaded if the ChromeOS EC implements a PPM.

Signed-off-by: Pavan Holla <

usb: typec: ucsi: Implement ChromeOS UCSI driver

Implementation of a UCSI transport driver for ChromeOS.
This driver will be loaded if the ChromeOS EC implements a PPM.

Signed-off-by: Pavan Holla <[email protected]>
Co-developed-by: Abhishek Pandit-Subedi <[email protected]>
Signed-off-by: Abhishek Pandit-Subedi <[email protected]>
Co-developed-by: Łukasz Bartosik <[email protected]>
Signed-off-by: Łukasz Bartosik <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Greg Kroah-Hartman <[email protected]>

show more ...

usb: typec: ucsi: add Lenovo Yoga C630 glue driver

The Lenovo Yoga C630 WOS laptop provides implements UCSI interface in
the onboard EC. Add glue driver to interface the platform's UCSI
implementati

usb: typec: ucsi: add Lenovo Yoga C630 glue driver

The Lenovo Yoga C630 WOS laptop provides implements UCSI interface in
the onboard EC. Add glue driver to interface the platform's UCSI
implementation.

Reviewed-by: Bryan O'Donoghue <[email protected]>
Reviewed-by: Heikki Krogerus <[email protected]>
Reviewed-by: Ilpo Järvinen <[email protected]>
Signed-off-by: Dmitry Baryshkov <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Greg Kroah-Hartman <[email protected]>

show more ...

usb: typec: ucsi: Add debugfs for ucsi commands

Add support for UCSI commands through the following debugfs:
# /sys/kernel/debug/usb/ucsi/$UCSI_DEVICE/command
# /sys/kernel/debug/usb/ucsi/$UCSI_

usb: typec: ucsi: Add debugfs for ucsi commands

Add support for UCSI commands through the following debugfs:
# /sys/kernel/debug/usb/ucsi/$UCSI_DEVICE/command
# /sys/kernel/debug/usb/ucsi/$UCSI_DEVICE/response

Eg: To execute UCSI GetCapabilities:
# echo 0x6 > /sys/kernel/debug/usb/ucsi/<ucsi device>/command
Then read the result,
# cat /sys/kernel/debug/usb/ucsi/<ucsi device>/response
0x02000320000000020000ff0400000445

UCSI command will be written into the command file and the
response for the command can be viewed under the response file.

Reviewed-by: Andy Shevchenko <[email protected]>
Signed-off-by: Saranya Gopal <[email protected]>
Co-developed-by: Rajaram Regupathy <[email protected]>
Signed-off-by: Rajaram Regupathy <[email protected]>
Reviewed-by: Heikki Krogerus <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Greg Kroah-Hartman <[email protected]>

show more ...

usb: typec: ucsi: add PMIC Glink UCSI driver

Introduce the UCSI PMIC Glink aux driver that communicates
with the aDSP firmware with the UCSI protocol which handles
the USB-C Port(s) Power Delivery.

usb: typec: ucsi: add PMIC Glink UCSI driver

Introduce the UCSI PMIC Glink aux driver that communicates
with the aDSP firmware with the UCSI protocol which handles
the USB-C Port(s) Power Delivery.

The UCSI messaging is necessary on newer Qualcomm SoCs to
provide USB role switch and altmode notifications.

Reviewed-by: Heikki Krogerus <[email protected]>
Signed-off-by: Neil Armstrong <[email protected]>
Reviewed-by: Bjorn Andersson <[email protected]>
Link: https://lore.kernel.org/r/20230130-topic-sm8450-upstream-pmic-glink-v5-1-552f3b721f9e@linaro.org
Signed-off-by: Greg Kroah-Hartman <[email protected]>

show more ...

usb: typec: ucsi: stm32g0: add support for stm32g0 controller

STM32G0 provides an integrated USB Type-C and power delivery interface.
It can be programmed with a firmware to handle UCSI protocol ove

usb: typec: ucsi: stm32g0: add support for stm32g0 controller

STM32G0 provides an integrated USB Type-C and power delivery interface.
It can be programmed with a firmware to handle UCSI protocol over I2C
interface. A GPIO is used as an interrupt line.

Type-C connector can be used as a wakeup source (typically to detect
changes on the port, like attach or detach). PM suspend / resume routines
are used to enable wake irqs, and signal a wakeup event in case the IRQ
has fired while in suspend. The i2c core is doing the necessary
initialization when the "wakeup-source" flag is provided.
Note: the interrupt handler shouldn't be called before the i2c bus resumes.
So, the interrupts are disabled during suspend period, and re-enabled
upon resume, to avoid i2c transfer while suspended, from the irq handler.

Acked-by: Heikki Krogerus <[email protected]>
Signed-off-by: Fabrice Gasnier <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Greg Kroah-Hartman <[email protected]>

show more ...

usb: typec: ucsi: Add conditional dependency on USB role switch

Preventing the driver from being built-in when USB Role
Switch Class is being build as module. That fixes a
potential undefined refere

usb: typec: ucsi: Add conditional dependency on USB role switch

Preventing the driver from being built-in when USB Role
Switch Class is being build as module. That fixes a
potential undefined reference error.

Fixes: 89795852c9c4 ("usb: typec: ucsi: Add support for USB role switch")
Reported-by: kernel test robot <[email protected]>
Signed-off-by: Heikki Krogerus <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Greg Kroah-Hartman <[email protected]>

show more ...

usb: typec: Replace HTTP links with HTTPS ones

Rationale:
Reduces attack surface on kernel devs opening the links for MITM
as HTTPS traffic is much harder to manipulate.

Deterministic algorithm:
Fo

usb: typec: Replace HTTP links with HTTPS ones

Rationale:
Reduces attack surface on kernel devs opening the links for MITM
as HTTPS traffic is much harder to manipulate.

Deterministic algorithm:
For each file:
If not .svg:
For each line:
If doesn't contain `\bxmlns\b`:
For each link, `\bhttp://[^# \t\r\n]*(?:\w|/)`:
If neither `\bgnu\.org/license`, nor `\bmozilla\.org/MPL\b`:
If both the HTTP and HTTPS versions
return 200 OK and serve the same content:
Replace HTTP with HTTPS.

Signed-off-by: Alexander A. Klimov <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Greg Kroah-Hartman <[email protected]>

show more ...

USB: add missing SPDX lines to Kconfig and Makefiles

There are a few remaining drivers/usb/ files that do not have SPDX
identifiers in them, all of these are either Kconfig or Makefiles. Add
the co

USB: add missing SPDX lines to Kconfig and Makefiles

There are a few remaining drivers/usb/ files that do not have SPDX
identifiers in them, all of these are either Kconfig or Makefiles. Add
the correct GPL-2.0 identifier to them to make scanning tools happy.

Signed-off-by: Greg Kroah-Hartman <[email protected]>

show more ...

usb: typec: ucsi: add support for Cypress CCGx

Latest NVIDIA GPU cards have a Cypress CCGx Type-C controller
over I2C interface.

This UCSI I2C driver uses I2C bus driver interface for communicating

usb: typec: ucsi: add support for Cypress CCGx

Latest NVIDIA GPU cards have a Cypress CCGx Type-C controller
over I2C interface.

This UCSI I2C driver uses I2C bus driver interface for communicating
with Type-C controller.

Signed-off-by: Ajay Gupta <[email protected]>
Acked-by: Heikki Krogerus <[email protected]>
Signed-off-by: Wolfram Sang <[email protected]>

show more ...

usb: add user selectable option for the whole USB Type-C Support

It is more clear from user perspective to wrap the whole USB
Type-C support under a single option that the user can
select, then it i

usb: add user selectable option for the whole USB Type-C Support

It is more clear from user perspective to wrap the whole USB
Type-C support under a single option that the user can
select, then it is to always ask the user for every USB
Type-C and USB Power Delivery driver separately.

Reported-by: Linus Torvalds <[email protected]>
Signed-off-by: Heikki Krogerus <[email protected]>
Signed-off-by: Greg Kroah-Hartman <[email protected]>

show more ...

usb: typec: ucsi: Add ACPI driver

Driver for ACPI UCSI interface method. This driver replaces
the previous UCSI driver drivers/usb/misc/ucsi.c.

Signed-off-by: Heikki Krogerus <heikki.krogerus@linux

usb: typec: ucsi: Add ACPI driver

Driver for ACPI UCSI interface method. This driver replaces
the previous UCSI driver drivers/usb/misc/ucsi.c.

Signed-off-by: Heikki Krogerus <[email protected]>
Reviewed-by: Guenter Roeck <[email protected]>
Signed-off-by: Greg Kroah-Hartman <[email protected]>

show more ...

usb: typec: Add support for UCSI interface

UCSI - USB Type-C Connector System Software Interface - is a
specification that defines set of registers and data
structures for controlling the USB Type-C

usb: typec: Add support for UCSI interface

UCSI - USB Type-C Connector System Software Interface - is a
specification that defines set of registers and data
structures for controlling the USB Type-C ports. It's
designed for systems where an embedded controller (EC) is in
charge of the USB Type-C PHY or USB Power Delivery
controller. It is designed for systems with EC, but it is
not limited to them, and for example some USB Power Delivery
controllers will use it as their direct control interface.

With UCSI the EC (or USB PD controller) acts as the port
manager, implementing all USB Type-C and Power Delivery state
machines. The OS can use the interfaces for reading the
status of the ports and controlling basic operations like
role swapping.

The UCSI specification highlights the fact that it does not
define the interface method (PCI/I2C/ACPI/etc.).
Therefore the driver is implemented as library and every
supported interface method needs its own driver. Driver for
ACPI is provided in separate patch following this one.

The initial driver includes support for all required
features from UCSI specification version 1.0 (getting
connector capabilities and status, and support for power and
data role swapping), but none of the optional UCSI features
(alternate modes, power source capabilities, and cable
capabilities).

Signed-off-by: Heikki Krogerus <[email protected]>
Reviewed-by: Guenter Roeck <[email protected]>
Signed-off-by: Greg Kroah-Hartman <[email protected]>

show more ...