usb: typec: Bus type for alternate modes
Introducing a simple bus for the alternate modes. Bus allows
binding drivers to the discovered alternate modes the
partners support.
Signed-off-by: Heikki Krogerus <heikki.krogerus@linux.intel.com>
Tested-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
diff --git a/include/linux/mod_devicetable.h b/include/linux/mod_devicetable.h
index 96a71a6..1298a7d 100644
--- a/include/linux/mod_devicetable.h
+++ b/include/linux/mod_devicetable.h
@@ -746,4 +746,19 @@ struct tb_service_id {
#define TBSVC_MATCH_PROTOCOL_VERSION 0x0004
#define TBSVC_MATCH_PROTOCOL_REVISION 0x0008
+/* USB Type-C Alternate Modes */
+
+#define TYPEC_ANY_MODE 0x7
+
+/**
+ * struct typec_device_id - USB Type-C alternate mode identifiers
+ * @svid: Standard or Vendor ID
+ * @mode: Mode index
+ */
+struct typec_device_id {
+ __u16 svid;
+ __u8 mode;
+ kernel_ulong_t driver_data;
+};
+
#endif /* LINUX_MOD_DEVICETABLE_H */
diff --git a/include/linux/usb/typec.h b/include/linux/usb/typec.h
index 2dcb168..7df4eca 100644
--- a/include/linux/usb/typec.h
+++ b/include/linux/usb/typec.h
@@ -5,21 +5,18 @@
#include <linux/types.h>
-/* XXX: Once we have a header for USB Power Delivery, this belongs there */
-#define ALTMODE_MAX_MODES 6
-
/* USB Type-C Specification releases */
#define USB_TYPEC_REV_1_0 0x100 /* 1.0 */
#define USB_TYPEC_REV_1_1 0x110 /* 1.1 */
#define USB_TYPEC_REV_1_2 0x120 /* 1.2 */
-struct typec_altmode;
struct typec_partner;
struct typec_cable;
struct typec_plug;
struct typec_port;
struct fwnode_handle;
+struct device;
enum typec_port_type {
TYPEC_PORT_SRC,
@@ -107,7 +104,7 @@ struct typec_altmode_desc {
u8 mode;
u32 vdo;
/* Only used with ports */
- enum typec_port_type roles;
+ enum typec_port_data roles;
};
struct typec_altmode
@@ -186,7 +183,6 @@ struct typec_partner_desc {
* @dr_set: Set Data Role
* @pr_set: Set Power Role
* @vconn_set: Set VCONN Role
- * @activate_mode: Enter/exit given Alternate Mode
* @port_type_set: Set port type
*
* Static capabilities of a single USB Type-C port.
@@ -212,12 +208,8 @@ struct typec_capability {
enum typec_role);
int (*vconn_set)(const struct typec_capability *,
enum typec_role);
-
- int (*activate_mode)(const struct typec_capability *,
- int mode, int activate);
int (*port_type_set)(const struct typec_capability *,
- enum typec_port_type);
-
+ enum typec_port_type);
};
/* Specific to try_role(). Indicates the user want's to clear the preference. */
diff --git a/include/linux/usb/typec_altmode.h b/include/linux/usb/typec_altmode.h
new file mode 100644
index 0000000..9a88c74
--- /dev/null
+++ b/include/linux/usb/typec_altmode.h
@@ -0,0 +1,160 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+
+#ifndef __USB_TYPEC_ALTMODE_H
+#define __USB_TYPEC_ALTMODE_H
+
+#include <linux/mod_devicetable.h>
+#include <linux/usb/typec.h>
+#include <linux/device.h>
+
+#define MODE_DISCOVERY_MAX 6
+
+struct typec_altmode_ops;
+
+/**
+ * struct typec_altmode - USB Type-C alternate mode device
+ * @dev: Driver model's view of this device
+ * @svid: Standard or Vendor ID (SVID) of the alternate mode
+ * @mode: Index of the Mode
+ * @vdo: VDO returned by Discover Modes USB PD command
+ * @active: Tells has the mode been entered or not
+ * @desc: Optional human readable description of the mode
+ * @ops: Operations vector from the driver
+ */
+struct typec_altmode {
+ struct device dev;
+ u16 svid;
+ int mode;
+ u32 vdo;
+ unsigned int active:1;
+
+ char *desc;
+ const struct typec_altmode_ops *ops;
+};
+
+#define to_typec_altmode(d) container_of(d, struct typec_altmode, dev)
+
+static inline void typec_altmode_set_drvdata(struct typec_altmode *altmode,
+ void *data)
+{
+ dev_set_drvdata(&altmode->dev, data);
+}
+
+static inline void *typec_altmode_get_drvdata(struct typec_altmode *altmode)
+{
+ return dev_get_drvdata(&altmode->dev);
+}
+
+/**
+ * struct typec_altmode_ops - Alternate mode specific operations vector
+ * @enter: Operations to be executed with Enter Mode Command
+ * @exit: Operations to be executed with Exit Mode Command
+ * @attention: Callback for Attention Command
+ * @vdm: Callback for SVID specific commands
+ * @notify: Communication channel for platform and the alternate mode
+ * @activate: User callback for Enter/Exit Mode
+ */
+struct typec_altmode_ops {
+ int (*enter)(struct typec_altmode *altmode);
+ int (*exit)(struct typec_altmode *altmode);
+ void (*attention)(struct typec_altmode *altmode, u32 vdo);
+ int (*vdm)(struct typec_altmode *altmode, const u32 hdr,
+ const u32 *vdo, int cnt);
+ int (*notify)(struct typec_altmode *altmode, unsigned long conf,
+ void *data);
+ int (*activate)(struct typec_altmode *altmode, int activate);
+};
+
+int typec_altmode_enter(struct typec_altmode *altmode);
+int typec_altmode_exit(struct typec_altmode *altmode);
+void typec_altmode_attention(struct typec_altmode *altmode, u32 vdo);
+int typec_altmode_vdm(struct typec_altmode *altmode,
+ const u32 header, const u32 *vdo, int count);
+int typec_altmode_notify(struct typec_altmode *altmode, unsigned long conf,
+ void *data);
+const struct typec_altmode *
+typec_altmode_get_partner(struct typec_altmode *altmode);
+
+/*
+ * These are the connector states (USB, Safe and Alt Mode) defined in USB Type-C
+ * Specification. SVID specific connector states are expected to follow and
+ * start from the value TYPEC_STATE_MODAL.
+ */
+enum {
+ TYPEC_STATE_SAFE, /* USB Safe State */
+ TYPEC_STATE_USB, /* USB Operation */
+ TYPEC_STATE_MODAL, /* Alternate Modes */
+};
+
+/*
+ * For the muxes there is no difference between Accessory Modes and Alternate
+ * Modes, so the Accessory Modes are supplied with specific modal state values
+ * here. Unlike with Alternate Modes, where the mux will be linked with the
+ * alternate mode device, the mux for Accessory Modes will be linked with the
+ * port device instead.
+ *
+ * Port drivers can use TYPEC_MODE_AUDIO and TYPEC_MODE_DEBUG as the mode
+ * value for typec_set_mode() when accessory modes are supported.
+ */
+enum {
+ TYPEC_MODE_AUDIO = TYPEC_STATE_MODAL, /* Audio Accessory */
+ TYPEC_MODE_DEBUG, /* Debug Accessory */
+};
+
+#define TYPEC_MODAL_STATE(_state_) ((_state_) + TYPEC_STATE_MODAL)
+
+struct typec_altmode *typec_altmode_get_plug(struct typec_altmode *altmode,
+ enum typec_plug_index index);
+void typec_altmode_put_plug(struct typec_altmode *plug);
+
+struct typec_altmode *typec_match_altmode(struct typec_altmode **altmodes,
+ size_t n, u16 svid, u8 mode);
+
+struct typec_altmode *
+typec_altmode_register_notifier(struct device *dev, u16 svid, u8 mode,
+ struct notifier_block *nb);
+
+void typec_altmode_unregister_notifier(struct typec_altmode *adev,
+ struct notifier_block *nb);
+
+/**
+ * typec_altmode_get_orientation - Get cable plug orientation
+ * altmode: Handle to the alternate mode
+ */
+static inline enum typec_orientation
+typec_altmode_get_orientation(struct typec_altmode *altmode)
+{
+ return typec_get_orientation(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
+ * @remove: Callback for device unbinding
+ * @driver: Device driver model driver
+ *
+ * These drivers will be bind to the partner alternate mode devices. They will
+ * handle all SVID specific communication.
+ */
+struct typec_altmode_driver {
+ const struct typec_device_id *id_table;
+ int (*probe)(struct typec_altmode *altmode);
+ void (*remove)(struct typec_altmode *altmode);
+ struct device_driver driver;
+};
+
+#define to_altmode_driver(d) container_of(d, struct typec_altmode_driver, \
+ driver)
+
+#define typec_altmode_register_driver(drv) \
+ __typec_altmode_register_driver(drv, THIS_MODULE)
+int __typec_altmode_register_driver(struct typec_altmode_driver *drv,
+ struct module *module);
+void typec_altmode_unregister_driver(struct typec_altmode_driver *drv);
+
+#define module_typec_altmode_driver(__typec_altmode_driver) \
+ module_driver(__typec_altmode_driver, typec_altmode_register_driver, \
+ typec_altmode_unregister_driver)
+
+#endif /* __USB_TYPEC_ALTMODE_H */