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-rw-r--r--drivers/usb/typec/Makefile1
-rw-r--r--drivers/usb/typec/class.c (renamed from drivers/usb/typec/typec.c)70
-rw-r--r--drivers/usb/typec/mux.c191
3 files changed, 262 insertions, 0 deletions
diff --git a/drivers/usb/typec/Makefile b/drivers/usb/typec/Makefile
index bb3138a6eaac..56b2e9516ec1 100644
--- a/drivers/usb/typec/Makefile
+++ b/drivers/usb/typec/Makefile
@@ -1,5 +1,6 @@
# SPDX-License-Identifier: GPL-2.0
obj-$(CONFIG_TYPEC) += typec.o
+typec-y := class.o mux.o
obj-$(CONFIG_TYPEC_TCPM) += tcpm.o
obj-y += fusb302/
obj-$(CONFIG_TYPEC_WCOVE) += typec_wcove.o
diff --git a/drivers/usb/typec/typec.c b/drivers/usb/typec/class.c
index dc28ad868d93..2620a694704f 100644
--- a/drivers/usb/typec/typec.c
+++ b/drivers/usb/typec/class.c
@@ -11,6 +11,7 @@
#include <linux/mutex.h>
#include <linux/slab.h>
#include <linux/usb/typec.h>
+#include <linux/usb/typec_mux.h>
struct typec_mode {
int index;
@@ -70,6 +71,10 @@ struct typec_port {
enum typec_port_type port_type;
struct mutex port_type_lock;
+ enum typec_orientation orientation;
+ struct typec_switch *sw;
+ struct typec_mux *mux;
+
const struct typec_capability *cap;
};
@@ -92,6 +97,7 @@ static const struct device_type typec_port_dev_type;
static DEFINE_IDA(typec_index_ida);
static struct class *typec_class;
+/* ------------------------------------------------------------------------- */
/* Common attributes */
static const char * const typec_accessory_modes[] = {
@@ -1137,6 +1143,8 @@ static void typec_release(struct device *dev)
struct typec_port *port = to_typec_port(dev);
ida_simple_remove(&typec_index_ida, port->id);
+ typec_switch_put(port->sw);
+ typec_mux_put(port->mux);
kfree(port);
}
@@ -1246,6 +1254,47 @@ void typec_set_pwr_opmode(struct typec_port *port,
}
EXPORT_SYMBOL_GPL(typec_set_pwr_opmode);
+/* ------------------------------------------ */
+/* API for Multiplexer/DeMultiplexer Switches */
+
+/**
+ * typec_set_orientation - Set USB Type-C cable plug orientation
+ * @port: USB Type-C Port
+ * @orientation: USB Type-C cable plug orientation
+ *
+ * Set cable plug orientation for @port.
+ */
+int typec_set_orientation(struct typec_port *port,
+ enum typec_orientation orientation)
+{
+ int ret;
+
+ if (port->sw) {
+ ret = port->sw->set(port->sw, orientation);
+ if (ret)
+ return ret;
+ }
+
+ port->orientation = orientation;
+
+ return 0;
+}
+EXPORT_SYMBOL_GPL(typec_set_orientation);
+
+/**
+ * typec_set_mode - Set mode of operation for USB Type-C connector
+ * @port: USB Type-C port for the connector
+ * @mode: Operation mode for the connector
+ *
+ * Set mode @mode for @port. This function will configure the muxes needed to
+ * enter @mode.
+ */
+int typec_set_mode(struct typec_port *port, int mode)
+{
+ return port->mux ? port->mux->set(port->mux, mode) : 0;
+}
+EXPORT_SYMBOL_GPL(typec_set_mode);
+
/* --------------------------------------- */
/**
@@ -1293,6 +1342,18 @@ struct typec_port *typec_register_port(struct device *parent,
return ERR_PTR(id);
}
+ port->sw = typec_switch_get(cap->fwnode ? &port->dev : parent);
+ if (IS_ERR(port->sw)) {
+ ret = PTR_ERR(port->sw);
+ goto err_switch;
+ }
+
+ port->mux = typec_mux_get(cap->fwnode ? &port->dev : parent);
+ if (IS_ERR(port->mux)) {
+ ret = PTR_ERR(port->mux);
+ goto err_mux;
+ }
+
if (cap->type == TYPEC_PORT_DFP)
role = TYPEC_SOURCE;
else if (cap->type == TYPEC_PORT_UFP)
@@ -1330,6 +1391,15 @@ struct typec_port *typec_register_port(struct device *parent,
}
return port;
+
+err_mux:
+ typec_switch_put(port->sw);
+
+err_switch:
+ ida_simple_remove(&typec_index_ida, port->id);
+ kfree(port);
+
+ return ERR_PTR(ret);
}
EXPORT_SYMBOL_GPL(typec_register_port);
diff --git a/drivers/usb/typec/mux.c b/drivers/usb/typec/mux.c
new file mode 100644
index 000000000000..f89093bd7185
--- /dev/null
+++ b/drivers/usb/typec/mux.c
@@ -0,0 +1,191 @@
+// SPDX-License-Identifier: GPL-2.0
+/**
+ * USB Type-C Multiplexer/DeMultiplexer Switch support
+ *
+ * Copyright (C) 2018 Intel Corporation
+ * Author: Heikki Krogerus <heikki.krogerus@linux.intel.com>
+ * Hans de Goede <hdegoede@redhat.com>
+ */
+
+#include <linux/device.h>
+#include <linux/list.h>
+#include <linux/mutex.h>
+#include <linux/usb/typec_mux.h>
+
+static DEFINE_MUTEX(switch_lock);
+static DEFINE_MUTEX(mux_lock);
+static LIST_HEAD(switch_list);
+static LIST_HEAD(mux_list);
+
+static void *typec_switch_match(struct device_connection *con, int ep,
+ void *data)
+{
+ struct typec_switch *sw;
+
+ list_for_each_entry(sw, &switch_list, entry)
+ if (!strcmp(con->endpoint[ep], dev_name(sw->dev)))
+ return sw;
+
+ /*
+ * We only get called if a connection was found, tell the caller to
+ * wait for the switch to show up.
+ */
+ return ERR_PTR(-EPROBE_DEFER);
+}
+
+/**
+ * typec_switch_get - Find USB Type-C orientation switch
+ * @dev: The caller device
+ *
+ * Finds a switch linked with @dev. Returns a reference to the switch on
+ * success, NULL if no matching connection was found, or
+ * ERR_PTR(-EPROBE_DEFER) when a connection was found but the switch
+ * has not been enumerated yet.
+ */
+struct typec_switch *typec_switch_get(struct device *dev)
+{
+ struct typec_switch *sw;
+
+ mutex_lock(&switch_lock);
+ sw = device_connection_find_match(dev, "typec-switch", NULL,
+ typec_switch_match);
+ if (!IS_ERR_OR_NULL(sw))
+ get_device(sw->dev);
+ mutex_unlock(&switch_lock);
+
+ return sw;
+}
+EXPORT_SYMBOL_GPL(typec_switch_get);
+
+/**
+ * typec_put_switch - Release USB Type-C orientation switch
+ * @sw: USB Type-C orientation switch
+ *
+ * Decrement reference count for @sw.
+ */
+void typec_switch_put(struct typec_switch *sw)
+{
+ if (!IS_ERR_OR_NULL(sw))
+ put_device(sw->dev);
+}
+EXPORT_SYMBOL_GPL(typec_switch_put);
+
+/**
+ * typec_switch_register - Register USB Type-C orientation switch
+ * @sw: USB Type-C orientation switch
+ *
+ * This function registers a switch that can be used for routing the correct
+ * data pairs depending on the cable plug orientation from the USB Type-C
+ * connector to the USB controllers. USB Type-C plugs can be inserted
+ * right-side-up or upside-down.
+ */
+int typec_switch_register(struct typec_switch *sw)
+{
+ mutex_lock(&switch_lock);
+ list_add_tail(&sw->entry, &switch_list);
+ mutex_unlock(&switch_lock);
+
+ return 0;
+}
+EXPORT_SYMBOL_GPL(typec_switch_register);
+
+/**
+ * typec_switch_unregister - Unregister USB Type-C orientation switch
+ * @sw: USB Type-C orientation switch
+ *
+ * Unregister switch that was registered with typec_switch_register().
+ */
+void typec_switch_unregister(struct typec_switch *sw)
+{
+ mutex_lock(&switch_lock);
+ list_del(&sw->entry);
+ mutex_unlock(&switch_lock);
+}
+EXPORT_SYMBOL_GPL(typec_switch_unregister);
+
+/* ------------------------------------------------------------------------- */
+
+static void *typec_mux_match(struct device_connection *con, int ep, void *data)
+{
+ struct typec_mux *mux;
+
+ list_for_each_entry(mux, &mux_list, entry)
+ if (!strcmp(con->endpoint[ep], dev_name(mux->dev)))
+ return mux;
+
+ /*
+ * We only get called if a connection was found, tell the caller to
+ * wait for the switch to show up.
+ */
+ return ERR_PTR(-EPROBE_DEFER);
+}
+
+/**
+ * typec_mux_get - Find USB Type-C Multiplexer
+ * @dev: The caller device
+ *
+ * Finds a mux linked to the caller. This function is primarily meant for the
+ * Type-C drivers. Returns a reference to the mux on success, NULL if no
+ * matching connection was found, or ERR_PTR(-EPROBE_DEFER) when a connection
+ * was found but the mux has not been enumerated yet.
+ */
+struct typec_mux *typec_mux_get(struct device *dev)
+{
+ struct typec_mux *mux;
+
+ mutex_lock(&mux_lock);
+ mux = device_connection_find_match(dev, "typec-mux", NULL,
+ typec_mux_match);
+ if (!IS_ERR_OR_NULL(mux))
+ get_device(mux->dev);
+ mutex_unlock(&mux_lock);
+
+ return mux;
+}
+EXPORT_SYMBOL_GPL(typec_mux_get);
+
+/**
+ * typec_mux_put - Release handle to a Multiplexer
+ * @mux: USB Type-C Connector Multiplexer/DeMultiplexer
+ *
+ * Decrements reference count for @mux.
+ */
+void typec_mux_put(struct typec_mux *mux)
+{
+ if (!IS_ERR_OR_NULL(mux))
+ put_device(mux->dev);
+}
+EXPORT_SYMBOL_GPL(typec_mux_put);
+
+/**
+ * typec_mux_register - Register Multiplexer routing USB Type-C pins
+ * @mux: USB Type-C Connector Multiplexer/DeMultiplexer
+ *
+ * USB Type-C connectors can be used for alternate modes of operation besides
+ * USB when Accessory/Alternate Modes are supported. With some of those modes,
+ * the pins on the connector need to be reconfigured. This function registers
+ * multiplexer switches routing the pins on the connector.
+ */
+int typec_mux_register(struct typec_mux *mux)
+{
+ mutex_lock(&mux_lock);
+ list_add_tail(&mux->entry, &mux_list);
+ mutex_unlock(&mux_lock);
+
+ return 0;
+}
+EXPORT_SYMBOL_GPL(typec_mux_register);
+
+/**
+ * typec_mux_unregister - Unregister Multiplexer Switch
+ * @sw: USB Type-C Connector Multiplexer/DeMultiplexer
+ *
+ * Unregister mux that was registered with typec_mux_register().
+ */
+void typec_mux_unregister(struct typec_mux *mux)
+{
+ mutex_lock(&mux_lock);
+ list_del(&mux->entry);
+ mutex_unlock(&mux_lock);
+}
+EXPORT_SYMBOL_GPL(typec_mux_unregister);
generated by cgit v1.2.3 (git 2.39.0) at 2024-07-11 15:50:25 +0300