1 files changed, 182 insertions, 0 deletions
diff --git a/drivers/esoc/esoc.h b/drivers/esoc/esoc.h
new file mode 100644
index 000000000000..ee54908ce486
--- /dev/null
+++ b/drivers/esoc/esoc.h
@@ -0,0 +1,182 @@
+/* Copyright (c) 2013-2015, 2017, The Linux Foundation. All rights reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 and
+ * only version 2 as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ */
+#ifndef __ESOC_H__
+#define __ESOC_H__
+
+#include <linux/cdev.h>
+#include <linux/completion.h>
+#include <linux/esoc_ctrl.h>
+#include <linux/fs.h>
+#include <linux/module.h>
+#include <linux/platform_device.h>
+#include <linux/slab.h>
+#include <linux/spinlock.h>
+#include <soc/qcom/subsystem_restart.h>
+#include <soc/qcom/subsystem_notif.h>
+
+#define ESOC_DEV_MAX		4
+#define ESOC_NAME_LEN		20
+#define ESOC_LINK_LEN		20
+
+struct esoc_clink;
+/**
+ * struct esoc_eng: Engine of the esoc control link
+ * @handle_clink_req: handle incoming esoc requests.
+ * @handle_clink_evt: handle for esoc events.
+ * @esoc_clink: pointer to esoc control link.
+ */
+struct esoc_eng {
+	void (*handle_clink_req)(enum esoc_req req,
+						struct esoc_eng *eng);
+	void (*handle_clink_evt)(enum esoc_evt evt,
+						struct esoc_eng *eng);
+	struct esoc_clink *esoc_clink;
+};
+
+/**
+ * struct esoc_clink: Representation of external esoc device
+ * @name: Name of the external esoc.
+ * @link_name: name of the physical link.
+ * @link_info: additional info about the physical link.
+ * @parent: parent device.
+ * @dev: device for userspace interface.
+ * @pdev: platform device to interface with SSR driver.
+ * @id: id of the external device.
+ * @owner: owner of the device.
+ * @clink_ops: control operations for the control link
+ * @req_eng: handle for request engine.
+ * @cmd_eng: handle for command engine.
+ * @clink_data: private data of esoc control link.
+ * @compat_data: compat data of esoc driver.
+ * @subsys_desc: descriptor for subsystem restart
+ * @subsys_dev: ssr device handle.
+ * @np: device tree node for esoc_clink.
+ * @auto_boot: boots independently.
+ * @primary: primary esoc controls(reset/poweroff) all secondary
+ *	 esocs, but not	otherway around.
+ * @statusline_not_a_powersource: True if status line to esoc is not a
+ *				power source.
+ * @userspace_handle_shutdown: True if user space handles shutdown requests.
+ */
+struct esoc_clink {
+	const char *name;
+	const char *link_name;
+	const char *link_info;
+	struct device *parent;
+	struct device dev;
+	struct platform_device *pdev;
+	unsigned int id;
+	struct module *owner;
+	const struct esoc_clink_ops const *clink_ops;
+	struct esoc_eng *req_eng;
+	struct esoc_eng *cmd_eng;
+	spinlock_t notify_lock;
+	void *clink_data;
+	void *compat_data;
+	struct subsys_desc subsys;
+	struct subsys_device *subsys_dev;
+	struct device_node *np;
+	bool auto_boot;
+	bool primary;
+	bool statusline_not_a_powersource;
+	bool userspace_handle_shutdown;
+};
+
+/**
+ * struct esoc_clink_ops: Operations to control external soc
+ * @cmd_exe: Execute control command
+ * @get_status: Get current status, or response to previous command
+ * @get_err_fatal: Get status of err fatal signal
+ * @notify_esoc: notify external soc of events
+ */
+struct esoc_clink_ops {
+	int (*cmd_exe)(enum esoc_cmd cmd, struct esoc_clink *dev);
+	void (*get_status)(u32 *status, struct esoc_clink *dev);
+	void (*get_err_fatal)(u32 *status, struct esoc_clink *dev);
+	void (*notify)(enum esoc_notify notify, struct esoc_clink *dev);
+};
+
+/**
+ * struct esoc_compat: Compatibility of esoc drivers.
+ * @name: esoc link that driver is compatible with.
+ * @data: driver data associated with esoc clink.
+ */
+struct esoc_compat {
+	const char *name;
+	void *data;
+};
+
+/**
+ * struct esoc_drv: Driver for an esoc clink
+ * @driver: drivers for esoc.
+ * @owner: module owner of esoc driver.
+ * @compat_table: compatible table for driver.
+ * @compat_entries
+ * @probe: probe function for esoc driver.
+ */
+struct esoc_drv {
+	struct device_driver driver;
+	struct module *owner;
+	struct esoc_compat *compat_table;
+	unsigned int compat_entries;
+	int (*probe)(struct esoc_clink *esoc_clink,
+				struct esoc_drv *drv);
+};
+
+#define to_esoc_clink(d) container_of(d, struct esoc_clink, dev)
+#define to_esoc_drv(d) container_of(d, struct esoc_drv, driver)
+
+extern struct bus_type esoc_bus_type;
+
+
+/* Exported apis */
+void esoc_dev_exit(void);
+int esoc_dev_init(void);
+void esoc_clink_unregister(struct esoc_clink *esoc_dev);
+int esoc_clink_register(struct esoc_clink *esoc_dev);
+struct esoc_clink *get_esoc_clink(int id);
+struct esoc_clink *get_esoc_clink_by_node(struct device_node *node);
+void put_esoc_clink(struct esoc_clink *esoc_clink);
+void *get_esoc_clink_data(struct esoc_clink *esoc);
+void set_esoc_clink_data(struct esoc_clink *esoc, void *data);
+void esoc_clink_evt_notify(enum esoc_evt, struct esoc_clink *esoc_dev);
+void esoc_clink_queue_request(enum esoc_req req, struct esoc_clink *esoc_dev);
+void esoc_for_each_dev(void *data, int (*fn)(struct device *dev,
+								void *data));
+int esoc_clink_register_cmd_eng(struct esoc_clink *esoc_clink,
+						struct esoc_eng *eng);
+void esoc_clink_unregister_cmd_eng(struct esoc_clink *esoc_clink,
+						struct esoc_eng *eng);
+int esoc_clink_register_req_eng(struct esoc_clink *esoc_clink,
+						struct esoc_eng *eng);
+void esoc_clink_unregister_req_eng(struct esoc_clink *esoc_clink,
+						struct esoc_eng *eng);
+int esoc_drv_register(struct esoc_drv *driver);
+void esoc_set_drv_data(struct esoc_clink *esoc_clink, void *data);
+void *esoc_get_drv_data(struct esoc_clink *esoc_clink);
+/* ssr operations */
+int esoc_clink_register_ssr(struct esoc_clink *esoc_clink);
+int esoc_clink_request_ssr(struct esoc_clink *esoc_clink);
+void esoc_clink_unregister_ssr(struct esoc_clink *esoc_clink);
+/* client notification */
+#ifdef CONFIG_ESOC_CLIENT
+void notify_esoc_clients(struct esoc_clink *esoc_clink, unsigned long evt);
+#else
+static inline void notify_esoc_clients(struct esoc_clink *esoc_clink,
+							unsigned long evt)
+{
+	return;
+}
+#endif
+bool esoc_req_eng_enabled(struct esoc_clink *esoc_clink);
+bool esoc_cmd_eng_enabled(struct esoc_clink *esoc_clink);
+#endif