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authorKyle Tso <kyletso@google.com>2021-02-05 06:34:09 +0300
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2021-02-09 13:48:54 +0300
commit3c5960c0559c44c6628341a82167ee0d3e40ee50 (patch)
tree5926695eb67f8ab5b3ec5e92b28ce3a0893506e7 /include/linux/usb
parent4b049f55ed95cd889bcdb3034fd75e1f01852b38 (diff)
downloadlinux-3c5960c0559c44c6628341a82167ee0d3e40ee50.tar.xz
usb: typec: Manage SVDM version
PD Spec Revision 3.0 Version 2.0 + ECNs 2020-12-10 6.4.4.2.3 Structured VDM Version "The Structured VDM Version field of the Discover Identity Command sent and received during VDM discovery Shall be used to determine the lowest common Structured VDM Version supported by the Port Partners or Cable Plug and Shall continue to operate using this Specification Revision until they are Detached." Add a variable in typec_capability to specify the highest SVDM version supported by the port and another variable in typec_partner to cache the negotiated SVDM version between the port and the partner. Also add setter/getter functions for the negotiated SVDM version. Acked-by: Heikki Krogerus <heikki.krogerus@linux.intel.com> Signed-off-by: Kyle Tso <kyletso@google.com> Link: https://lore.kernel.org/r/20210205033415.3320439-2-kyletso@google.com Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'include/linux/usb')
-rw-r--r--include/linux/usb/typec.h12
-rw-r--r--include/linux/usb/typec_altmode.h10
2 files changed, 22 insertions, 0 deletions
diff --git a/include/linux/usb/typec.h b/include/linux/usb/typec.h
index a94df82ab62f..91b4303ca305 100644
--- a/include/linux/usb/typec.h
+++ b/include/linux/usb/typec.h
@@ -217,12 +217,19 @@ struct typec_operations {
enum typec_port_type type);
};
+enum usb_pd_svdm_ver {
+ SVDM_VER_1_0 = 0,
+ SVDM_VER_2_0 = 1,
+ SVDM_VER_MAX = SVDM_VER_2_0,
+};
+
/*
* struct typec_capability - USB Type-C Port Capabilities
* @type: Supported power role of the port
* @data: Supported data role of the port
* @revision: USB Type-C Specification release. Binary coded decimal
* @pd_revision: USB Power Delivery Specification revision if supported
+ * @svdm_version: USB PD Structured VDM version if supported
* @prefer_role: Initial role preference (DRP ports).
* @accessory: Supported Accessory Modes
* @fwnode: Optional fwnode of the port
@@ -236,6 +243,7 @@ struct typec_capability {
enum typec_port_data data;
u16 revision; /* 0120H = "1.2" */
u16 pd_revision; /* 0300H = "3.0" */
+ enum usb_pd_svdm_ver svdm_version;
int prefer_role;
enum typec_accessory accessory[TYPEC_MAX_ACCESSORY];
unsigned int orientation_aware:1;
@@ -286,4 +294,8 @@ int typec_find_orientation(const char *name);
int typec_find_port_power_role(const char *name);
int typec_find_power_role(const char *name);
int typec_find_port_data_role(const char *name);
+
+void typec_partner_set_svdm_version(struct typec_partner *partner,
+ enum usb_pd_svdm_ver svdm_version);
+int typec_get_negotiated_svdm_version(struct typec_port *port);
#endif /* __LINUX_USB_TYPEC_H */
diff --git a/include/linux/usb/typec_altmode.h b/include/linux/usb/typec_altmode.h
index 5e0a7b7647c3..65933cbe9129 100644
--- a/include/linux/usb/typec_altmode.h
+++ b/include/linux/usb/typec_altmode.h
@@ -133,6 +133,16 @@ typec_altmode_get_orientation(struct typec_altmode *altmode)
}
/**
+ * typec_altmode_get_svdm_version - Get negotiated SVDM version
+ * @altmode: Handle to the alternate mode
+ */
+static inline int
+typec_altmode_get_svdm_version(struct typec_altmode *altmode)
+{
+ return typec_get_negotiated_svdm_version(typec_altmode2port(altmode));
+}
+
+/**
* struct typec_altmode_driver - USB Type-C alternate mode device driver
* @id_table: Null terminated array of SVIDs
* @probe: Callback for device binding