diff options
Diffstat (limited to 'drivers/usb/typec/class.c')
| -rw-r--r-- | drivers/usb/typec/class.c | 124 |
1 files changed, 120 insertions, 4 deletions
diff --git a/drivers/usb/typec/class.c b/drivers/usb/typec/class.c index 2f12269d1465..953cfb1b093e 100644 --- a/drivers/usb/typec/class.c +++ b/drivers/usb/typec/class.c @@ -618,6 +618,75 @@ EXPORT_SYMBOL_GPL(typec_unregister_altmode); /* ------------------------------------------------------------------------- */ /* Type-C Partners */ +/** + * typec_partner_set_usb_mode - Assign active USB Mode for the partner + * @partner: USB Type-C partner + * @mode: USB Mode (USB2, USB3 or USB4) + * + * The port drivers can use this function to assign the active USB Mode to + * @partner. The USB Mode can change for example due to Data Reset. + */ +void typec_partner_set_usb_mode(struct typec_partner *partner, enum usb_mode mode) +{ + if (!partner || partner->usb_mode == mode) + return; + + partner->usb_capability |= BIT(mode - 1); + partner->usb_mode = mode; + sysfs_notify(&partner->dev.kobj, NULL, "usb_mode"); +} +EXPORT_SYMBOL_GPL(typec_partner_set_usb_mode); + +static ssize_t +usb_mode_show(struct device *dev, struct device_attribute *attr, char *buf) +{ + struct typec_partner *partner = to_typec_partner(dev); + int len = 0; + int i; + + for (i = USB_MODE_USB2; i < USB_MODE_USB4 + 1; i++) { + if (!(BIT(i - 1) & partner->usb_capability)) + continue; + + if (i == partner->usb_mode) + len += sysfs_emit_at(buf, len, "[%s] ", usb_modes[i]); + else + len += sysfs_emit_at(buf, len, "%s ", usb_modes[i]); + } + + sysfs_emit_at(buf, len - 1, "\n"); + + return len; +} + +static ssize_t usb_mode_store(struct device *dev, struct device_attribute *attr, + const char *buf, size_t size) +{ + struct typec_partner *partner = to_typec_partner(dev); + struct typec_port *port = to_typec_port(dev->parent); + int mode; + int ret; + + if (!port->ops || !port->ops->enter_usb_mode) + return -EOPNOTSUPP; + + mode = sysfs_match_string(usb_modes, buf); + if (mode < 0) + return mode; + + if (mode == partner->usb_mode) + return size; + + ret = port->ops->enter_usb_mode(port, mode); + if (ret) + return ret; + + typec_partner_set_usb_mode(partner, mode); + + return size; +} +static DEVICE_ATTR_RW(usb_mode); + static ssize_t accessory_mode_show(struct device *dev, struct device_attribute *attr, char *buf) @@ -664,6 +733,7 @@ static struct attribute *typec_partner_attrs[] = { &dev_attr_supports_usb_power_delivery.attr, &dev_attr_number_of_alternate_modes.attr, &dev_attr_type.attr, + &dev_attr_usb_mode.attr, &dev_attr_usb_power_delivery_revision.attr, NULL }; @@ -671,6 +741,14 @@ static struct attribute *typec_partner_attrs[] = { static umode_t typec_partner_attr_is_visible(struct kobject *kobj, struct attribute *attr, int n) { struct typec_partner *partner = to_typec_partner(kobj_to_dev(kobj)); + struct typec_port *port = to_typec_port(partner->dev.parent); + + if (attr == &dev_attr_usb_mode.attr) { + if (!partner->usb_capability) + return 0; + if (!port->ops || !port->ops->enter_usb_mode) + return 0444; + } if (attr == &dev_attr_number_of_alternate_modes.attr) { if (partner->num_altmodes < 0) @@ -744,10 +822,33 @@ static void typec_partner_unlink_device(struct typec_partner *partner, struct de */ int typec_partner_set_identity(struct typec_partner *partner) { - if (!partner->identity) + u8 usb_capability = partner->usb_capability; + struct device *dev = &partner->dev; + struct usb_pd_identity *id; + + id = get_pd_identity(dev); + if (!id) return -EINVAL; - typec_report_identity(&partner->dev); + if (to_typec_port(dev->parent)->data_role == TYPEC_HOST) { + u32 devcap = PD_VDO_UFP_DEVCAP(id->vdo[0]); + + if (devcap & (DEV_USB2_CAPABLE | DEV_USB2_BILLBOARD)) + usb_capability |= USB_CAPABILITY_USB2; + if (devcap & DEV_USB3_CAPABLE) + usb_capability |= USB_CAPABILITY_USB3; + if (devcap & DEV_USB4_CAPABLE) + usb_capability |= USB_CAPABILITY_USB4; + } else { + usb_capability = PD_VDO_DFP_HOSTCAP(id->vdo[0]); + } + + if (partner->usb_capability != usb_capability) { + partner->usb_capability = usb_capability; + sysfs_notify(&dev->kobj, NULL, "usb_mode"); + } + + typec_report_identity(dev); return 0; } EXPORT_SYMBOL_GPL(typec_partner_set_identity); @@ -917,6 +1018,7 @@ struct typec_partner *typec_register_partner(struct typec_port *port, partner->usb_pd = desc->usb_pd; partner->accessory = desc->accessory; partner->num_altmodes = -1; + partner->usb_capability = desc->usb_capability; partner->pd_revision = desc->pd_revision; partner->svdm_version = port->cap->svdm_version; partner->attach = desc->attach; @@ -936,6 +1038,15 @@ struct typec_partner *typec_register_partner(struct typec_port *port, partner->dev.type = &typec_partner_dev_type; dev_set_name(&partner->dev, "%s-partner", dev_name(&port->dev)); + if (port->usb2_dev) { + partner->usb_capability |= USB_CAPABILITY_USB2; + partner->usb_mode = USB_MODE_USB2; + } + if (port->usb3_dev) { + partner->usb_capability |= USB_CAPABILITY_USB2 | USB_CAPABILITY_USB3; + partner->usb_mode = USB_MODE_USB3; + } + ret = device_register(&partner->dev); if (ret) { dev_err(&port->dev, "failed to register partner (%d)\n", ret); @@ -1935,13 +2046,18 @@ static void typec_partner_attach(struct typec_connector *con, struct device *dev struct typec_port *port = container_of(con, struct typec_port, con); struct typec_partner *partner = typec_get_partner(port); struct usb_device *udev = to_usb_device(dev); + enum usb_mode usb_mode; - if (udev->speed < USB_SPEED_SUPER) + if (udev->speed < USB_SPEED_SUPER) { + usb_mode = USB_MODE_USB2; port->usb2_dev = dev; - else + } else { + usb_mode = USB_MODE_USB3; port->usb3_dev = dev; + } if (partner) { + typec_partner_set_usb_mode(partner, usb_mode); typec_partner_link_device(partner, dev); put_device(&partner->dev); } |