| Message ID | 20250210130419.4110130-1-akuchynski@chromium.org (mailing list archive) |
|---|---|
| State | New |
| Headers | show |
| Series | platform/chrome: cros_ec_typec: Add support for setting USB mode via sysfs | expand |
On Mon, Feb 10, 2025 at 01:04:19PM +0000, Andrei Kuchynski wrote: > +static int cros_typec_enter_usb_mode(struct typec_port *tc_port, enum usb_mode mode) > +{ > + struct cros_typec_port *port = typec_get_drvdata(tc_port); > + struct ec_params_typec_control req = { > + .port = port->port_num, > + .command = (mode == USB_MODE_USB4) ? > + TYPEC_CONTROL_COMMAND_ENTER_MODE : TYPEC_CONTROL_COMMAND_EXIT_MODES, > + .mode_to_enter = CROS_EC_ALTMODE_USB4 The symbol `CROS_EC_ALTMODE_USB4` doesn't exist. On a related note, wouldn't it always enter CROS_EC_ALTMODE_USB4 if the value is hard-coded here? > @@ -84,6 +102,13 @@ static int cros_typec_parse_port_props(struct typec_capability *cap, > cap->prefer_role = ret; > } > > + if (fwnode_property_present(fwnode, "usb2-port")) > + cap->usb_capability |= USB_CAPABILITY_USB2; > + if (fwnode_property_present(fwnode, "usb3-port")) > + cap->usb_capability |= USB_CAPABILITY_USB3; > + if (fwnode_property_present(fwnode, "usb4-port")) > + cap->usb_capability |= USB_CAPABILITY_USB4; Are these defined somewhere? E.g. the bindings?
diff --git a/drivers/platform/chrome/cros_ec_typec.c b/drivers/platform/chrome/cros_ec_typec.c index 6ee182101bc9..d2228720991f 100644 --- a/drivers/platform/chrome/cros_ec_typec.c +++ b/drivers/platform/chrome/cros_ec_typec.c @@ -42,6 +42,24 @@ static void cros_typec_role_switch_quirk(struct fwnode_handle *fwnode) #endif } +static int cros_typec_enter_usb_mode(struct typec_port *tc_port, enum usb_mode mode) +{ + struct cros_typec_port *port = typec_get_drvdata(tc_port); + struct ec_params_typec_control req = { + .port = port->port_num, + .command = (mode == USB_MODE_USB4) ? + TYPEC_CONTROL_COMMAND_ENTER_MODE : TYPEC_CONTROL_COMMAND_EXIT_MODES, + .mode_to_enter = CROS_EC_ALTMODE_USB4 + }; + + return cros_ec_cmd(port->typec_data->ec, 0, EC_CMD_TYPEC_CONTROL, + &req, sizeof(req), NULL, 0); +} + +static const struct typec_operations cros_typec_usb_mode_ops = { + .enter_usb_mode = cros_typec_enter_usb_mode +}; + static int cros_typec_parse_port_props(struct typec_capability *cap, struct fwnode_handle *fwnode, struct device *dev) @@ -84,6 +102,13 @@ static int cros_typec_parse_port_props(struct typec_capability *cap, cap->prefer_role = ret; } + if (fwnode_property_present(fwnode, "usb2-port")) + cap->usb_capability |= USB_CAPABILITY_USB2; + if (fwnode_property_present(fwnode, "usb3-port")) + cap->usb_capability |= USB_CAPABILITY_USB3; + if (fwnode_property_present(fwnode, "usb4-port")) + cap->usb_capability |= USB_CAPABILITY_USB4; + cros_typec_role_switch_quirk(fwnode); cap->fwnode = fwnode; @@ -379,6 +404,9 @@ static int cros_typec_init_ports(struct cros_typec_data *typec) if (ret < 0) goto unregister_ports; + cap->driver_data = cros_port; + cap->ops = &cros_typec_usb_mode_ops; + cros_port->port = typec_register_port(dev, cap); if (IS_ERR(cros_port->port)) { ret = PTR_ERR(cros_port->port); diff --git a/drivers/platform/chrome/cros_ec_typec.h b/drivers/platform/chrome/cros_ec_typec.h index 9fd5342bb0ad..f9c31f04c102 100644 --- a/drivers/platform/chrome/cros_ec_typec.h +++ b/drivers/platform/chrome/cros_ec_typec.h @@ -18,6 +18,7 @@ enum { CROS_EC_ALTMODE_DP = 0, CROS_EC_ALTMODE_TBT, + CROS_EC_ALTMODE_USB4, CROS_EC_ALTMODE_MAX, };
This patch implements USB mode setting via a sysfs interface in cros_ec_typec driver. User-space applications can now change the current USB mode by writing to "usb_mode" sysfs entry, replacing the previous ioctl-based method. The embedded controller (EC) currently supports only entering USB4 mode and exiting all modes (including altmodes). Both of these operations trigger Data Reset Message, even if no USB Mode is active. Additionally, the patch exposes the USB modes supported by the port via "usb_capability" sysfs attribute. Signed-off-by: Andrei Kuchynski <akuchynski@chromium.org> --- drivers/platform/chrome/cros_ec_typec.c | 28 +++++++++++++++++++++++++ drivers/platform/chrome/cros_ec_typec.h | 1 + 2 files changed, 29 insertions(+)