1 files changed, 85 insertions, 0 deletions
diff --git a/include/linux/greybus/hd.h b/include/linux/greybus/hd.h
new file mode 100644
index 000000000000..d3faf0c1a569
--- /dev/null
+++ b/include/linux/greybus/hd.h
@@ -0,0 +1,85 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * Greybus Host Device
+ *
+ * Copyright 2014-2015 Google Inc.
+ * Copyright 2014-2015 Linaro Ltd.
+ */
+
+#ifndef __HD_H
+#define __HD_H
+
+#include <linux/types.h>
+#include <linux/device.h>
+
+struct gb_host_device;
+struct gb_message;
+
+struct gb_hd_driver {
+	size_t	hd_priv_size;
+
+	int (*cport_allocate)(struct gb_host_device *hd, int cport_id,
+				unsigned long flags);
+	void (*cport_release)(struct gb_host_device *hd, u16 cport_id);
+	int (*cport_enable)(struct gb_host_device *hd, u16 cport_id,
+				unsigned long flags);
+	int (*cport_disable)(struct gb_host_device *hd, u16 cport_id);
+	int (*cport_connected)(struct gb_host_device *hd, u16 cport_id);
+	int (*cport_flush)(struct gb_host_device *hd, u16 cport_id);
+	int (*cport_shutdown)(struct gb_host_device *hd, u16 cport_id,
+				u8 phase, unsigned int timeout);
+	int (*cport_quiesce)(struct gb_host_device *hd, u16 cport_id,
+				size_t peer_space, unsigned int timeout);
+	int (*cport_clear)(struct gb_host_device *hd, u16 cport_id);
+
+	int (*message_send)(struct gb_host_device *hd, u16 dest_cport_id,
+			struct gb_message *message, gfp_t gfp_mask);
+	void (*message_cancel)(struct gb_message *message);
+	int (*latency_tag_enable)(struct gb_host_device *hd, u16 cport_id);
+	int (*latency_tag_disable)(struct gb_host_device *hd, u16 cport_id);
+	int (*output)(struct gb_host_device *hd, void *req, u16 size, u8 cmd,
+		      bool async);
+};
+
+struct gb_host_device {
+	struct device dev;
+	int bus_id;
+	const struct gb_hd_driver *driver;
+
+	struct list_head modules;
+	struct list_head connections;
+	struct ida cport_id_map;
+
+	/* Number of CPorts supported by the UniPro IP */
+	size_t num_cports;
+
+	/* Host device buffer constraints */
+	size_t buffer_size_max;
+
+	struct gb_svc *svc;
+	/* Private data for the host driver */
+	unsigned long hd_priv[0] __aligned(sizeof(s64));
+};
+#define to_gb_host_device(d) container_of(d, struct gb_host_device, dev)
+
+int gb_hd_cport_reserve(struct gb_host_device *hd, u16 cport_id);
+void gb_hd_cport_release_reserved(struct gb_host_device *hd, u16 cport_id);
+int gb_hd_cport_allocate(struct gb_host_device *hd, int cport_id,
+					unsigned long flags);
+void gb_hd_cport_release(struct gb_host_device *hd, u16 cport_id);
+
+struct gb_host_device *gb_hd_create(struct gb_hd_driver *driver,
+					struct device *parent,
+					size_t buffer_size_max,
+					size_t num_cports);
+int gb_hd_add(struct gb_host_device *hd);
+void gb_hd_del(struct gb_host_device *hd);
+void gb_hd_shutdown(struct gb_host_device *hd);
+void gb_hd_put(struct gb_host_device *hd);
+int gb_hd_output(struct gb_host_device *hd, void *req, u16 size, u8 cmd,
+		 bool in_irq);
+
+int gb_hd_init(void);
+void gb_hd_exit(void);
+
+#endif	/* __HD_H */