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/*
* Copyright © 2011 Intel Corporation
*
* This program is free software; you can redistribute it and/or modify it
* under the terms and conditions of the GNU General Public License,
* version 2, as published by the Free Software Foundation.
*
* This program is distributed in the hope 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.
*
* You should have received a copy of the GNU General Public License along with
* this program; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
*
* Authors:
* James C. Gualario <james.c.gualario@intel.com>
*
*/
#ifndef _PSB_HOTPLUG_H_
#define _PSB_HOTPLUG_H_
/**
* required includes
*
*/
#include "psb_umevents.h"
/**
* hotplug specific defines
*
*/
#define DRM_HOTPLUG_RING_DEPTH 256
#define DRM_HOTPLUG_RING_DEPTH_MAX (DRM_HOTPLUG_RING_DEPTH-1)
#define DRM_HOTPLUG_READY_TO_READ 1
#define DRM_HOTPLUG_READ_COMPLETE 2
/**
* hotplug workqueue data struct.
*/
struct hotplug_disp_workqueue_data {
struct work_struct work;
const char *dev_name;
int dev_name_write;
int dev_name_read;
int dev_name_write_wrap;
int dev_name_read_write_wrap_ack;
char dev_name_arry[DRM_HOTPLUG_RING_DEPTH][24];
int dev_name_arry_rw_status[DRM_HOTPLUG_RING_DEPTH];
struct umevent_list *hotplug_dev_list;
};
/**
* hotplug state structure
*
*/
struct hotplug_state {
struct workqueue_struct *hotplug_wq;
struct hotplug_disp_workqueue_data hotplug_remove_wq_data;
struct hotplug_disp_workqueue_data hotplug_create_wq_data;
struct hotplug_disp_workqueue_data hotplug_change_wq_data;
struct umevent_list *list;
};
/**
* main interface function prototytpes for hotplug support.
*
*/
struct hotplug_state *psb_hotplug_init(struct kobject *parent_kobj);
extern int psb_hotplug_notify_change_um(const char *name,
struct hotplug_state *state);
extern int psb_hotplug_create_and_notify_um(const char *name,
struct hotplug_state *state);
extern int psb_hotplug_remove_and_notify_um(const char *name,
struct hotplug_state *state);
extern struct umevent_list *psb_hotplug_device_pool_create_and_init(
struct kobject *parent_kobj,
struct hotplug_state *state);
extern void psb_hotplug_device_pool_destroy(struct hotplug_state *state);
/**
* to go back and forth between work strauct and workqueue data
*
*/
#define to_hotplug_disp_workqueue_data(x) \
container_of(x, struct hotplug_disp_workqueue_data, work)
/**
* function prototypes for workqueue implementation
*
*/
extern void psb_hotplug_dev_create_wq(struct work_struct *work);
extern void psb_hotplug_dev_remove_wq(struct work_struct *work);
extern void psb_hotplug_dev_change_wq(struct work_struct *work);
#endif
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