8bfc388179
Add support to handle SMD signals to RPMSG over GLINK. SMD signals mimic serial protocol signals to notify of ports opening and closing. This change affects the glink_pkt, rpmsg core and glink drivers. Change-Id: I0b09219c793d23c65bae8ca747fc480ae6db47a6 Signed-off-by: Chris Lew <clew@codeaurora.org>
106 lines
3.9 KiB
C
106 lines
3.9 KiB
C
/*
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* remote processor messaging bus internals
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*
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* Copyright (C) 2011 Texas Instruments, Inc.
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* Copyright (C) 2011 Google, Inc.
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* Copyright (c) 2018, The Linux Foundation. All rights reserved.
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*
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* Ohad Ben-Cohen <ohad@wizery.com>
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* Brian Swetland <swetland@google.com>
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*
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* This software is licensed under the terms of the GNU General Public
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* License version 2, as published by the Free Software Foundation, and
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* may be copied, distributed, and modified under those terms.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*/
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#ifndef __RPMSG_INTERNAL_H__
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#define __RPMSG_INTERNAL_H__
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#include <linux/rpmsg.h>
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#include <linux/poll.h>
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#define to_rpmsg_device(d) container_of(d, struct rpmsg_device, dev)
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#define to_rpmsg_driver(d) container_of(d, struct rpmsg_driver, drv)
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/**
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* struct rpmsg_device_ops - indirection table for the rpmsg_device operations
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* @create_ept: create backend-specific endpoint, requried
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* @announce_create: announce presence of new channel, optional
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* @announce_destroy: announce destruction of channel, optional
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*
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* Indirection table for the operations that a rpmsg backend should implement.
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* @announce_create and @announce_destroy are optional as the backend might
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* advertise new channels implicitly by creating the endpoints.
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*/
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struct rpmsg_device_ops {
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struct rpmsg_endpoint *(*create_ept)(struct rpmsg_device *rpdev,
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rpmsg_rx_cb_t cb, void *priv,
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struct rpmsg_channel_info chinfo);
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int (*announce_create)(struct rpmsg_device *ept);
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int (*announce_destroy)(struct rpmsg_device *ept);
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};
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/**
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* struct rpmsg_endpoint_ops - indirection table for rpmsg_endpoint operations
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* @destroy_ept: destroy the given endpoint, required
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* @send: see @rpmsg_send(), required
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* @sendto: see @rpmsg_sendto(), optional
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* @send_offchannel: see @rpmsg_send_offchannel(), optional
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* @trysend: see @rpmsg_trysend(), required
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* @trysendto: see @rpmsg_trysendto(), optional
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* @trysend_offchannel: see @rpmsg_trysend_offchannel(), optional
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* @get_sigs: see @rpmsg_get_sigs(), optional
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* @set_sigs: see @rpmsg_set_sigs(), optional
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*
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* Indirection table for the operations that a rpmsg backend should implement.
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* In addition to @destroy_ept, the backend must at least implement @send and
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* @trysend, while the variants sending data off-channel are optional.
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*/
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struct rpmsg_endpoint_ops {
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void (*destroy_ept)(struct rpmsg_endpoint *ept);
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int (*send)(struct rpmsg_endpoint *ept, void *data, int len);
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int (*sendto)(struct rpmsg_endpoint *ept, void *data, int len, u32 dst);
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int (*send_offchannel)(struct rpmsg_endpoint *ept, u32 src, u32 dst,
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void *data, int len);
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int (*trysend)(struct rpmsg_endpoint *ept, void *data, int len);
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int (*trysendto)(struct rpmsg_endpoint *ept, void *data, int len, u32 dst);
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int (*trysend_offchannel)(struct rpmsg_endpoint *ept, u32 src, u32 dst,
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void *data, int len);
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unsigned int (*poll)(struct rpmsg_endpoint *ept, struct file *filp,
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poll_table *wait);
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int (*get_sigs)(struct rpmsg_endpoint *ept, u32 *lsigs, u32 *rsigs);
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int (*set_sigs)(struct rpmsg_endpoint *ept, u32 sigs);
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};
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int rpmsg_register_device(struct rpmsg_device *rpdev);
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int rpmsg_unregister_device(struct device *parent,
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struct rpmsg_channel_info *chinfo);
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struct device *rpmsg_find_device(struct device *parent,
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struct rpmsg_channel_info *chinfo);
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/**
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* rpmsg_chrdev_register_device() - register chrdev device based on rpdev
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* @rpdev: prepared rpdev to be used for creating endpoints
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*
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* This function wraps rpmsg_register_device() preparing the rpdev for use as
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* basis for the rpmsg chrdev.
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*/
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static inline int rpmsg_chrdev_register_device(struct rpmsg_device *rpdev)
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{
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strcpy(rpdev->id.name, "rpmsg_chrdev");
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rpdev->driver_override = "rpmsg_chrdev";
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return rpmsg_register_device(rpdev);
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}
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#endif
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