01d0f9c0e4
In some cases, the syscon driver may be used by consumer requiring better control about locking (ie. it may be used as registe file provider for clock driver which needs locked access to multiple registers). Add fine locking protocol methods together with bunch of helper functions in syscon driver and implement this functionality in syscon_generic driver. MFC after: 4 weeks
136 lines
3.1 KiB
Objective-C
136 lines
3.1 KiB
Objective-C
#-
|
|
# Copyright (c) 2015 Michal Meloun
|
|
# All rights reserved.
|
|
#
|
|
# Redistribution and use in source and binary forms, with or without
|
|
# modification, are permitted provided that the following conditions
|
|
# are met:
|
|
# 1. Redistributions of source code must retain the above copyright
|
|
# notice, this list of conditions and the following disclaimer.
|
|
# 2. Redistributions in binary form must reproduce the above copyright
|
|
# notice, this list of conditions and the following disclaimer in the
|
|
# documentation and/or other materials provided with the distribution.
|
|
#
|
|
# THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
|
|
# ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
|
# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
|
# ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
|
|
# FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
|
# DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
|
|
# OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
|
# HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
|
# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
|
|
# OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
|
# SUCH DAMAGE.
|
|
#
|
|
# $FreeBSD$
|
|
#
|
|
|
|
#include <machine/bus.h>
|
|
|
|
INTERFACE syscon;
|
|
|
|
HEADER {
|
|
struct syscon;
|
|
int syscon_get_handle_default(device_t dev, struct syscon **syscon);
|
|
}
|
|
|
|
CODE {
|
|
#include <sys/systm.h>
|
|
#include <sys/bus.h>
|
|
|
|
int
|
|
syscon_get_handle_default(device_t dev, struct syscon **syscon)
|
|
{
|
|
device_t parent;
|
|
|
|
parent = device_get_parent(dev);
|
|
if (parent == NULL)
|
|
return (ENODEV);
|
|
return (SYSCON_GET_HANDLE(parent, syscon));
|
|
}
|
|
|
|
static void
|
|
syscon_device_lock_default(device_t dev)
|
|
{
|
|
|
|
panic("syscon_device_lock is not implemented");
|
|
};
|
|
|
|
static void
|
|
syscon_device_unlock_default(device_t dev)
|
|
{
|
|
|
|
panic("syscon_device_unlock is not implemented");
|
|
};
|
|
}
|
|
|
|
METHOD int init {
|
|
struct syscon *syscon;
|
|
};
|
|
|
|
METHOD int uninit {
|
|
struct syscon *syscon;
|
|
};
|
|
|
|
/**
|
|
* Accessor functions for syscon register space
|
|
*/
|
|
METHOD uint32_t read_4 {
|
|
struct syscon *syscon;
|
|
bus_size_t offset;
|
|
};
|
|
|
|
METHOD int write_4 {
|
|
struct syscon *syscon;
|
|
bus_size_t offset;
|
|
uint32_t val;
|
|
};
|
|
|
|
METHOD int modify_4 {
|
|
struct syscon *syscon;
|
|
bus_size_t offset;
|
|
uint32_t clear_bits;
|
|
uint32_t set_bits;
|
|
};
|
|
|
|
/**
|
|
* Unlocked verion of access function
|
|
*/
|
|
METHOD uint32_t unlocked_read_4 {
|
|
struct syscon *syscon;
|
|
bus_size_t offset;
|
|
};
|
|
|
|
METHOD int unlocked_write_4 {
|
|
struct syscon *syscon;
|
|
bus_size_t offset;
|
|
uint32_t val;
|
|
};
|
|
|
|
METHOD int unlocked_modify_4 {
|
|
struct syscon *syscon;
|
|
bus_size_t offset;
|
|
uint32_t clear_bits;
|
|
uint32_t set_bits;
|
|
};
|
|
|
|
/**
|
|
* Locking for exclusive access to underlying device
|
|
*/
|
|
METHOD void device_lock {
|
|
device_t dev;
|
|
} DEFAULT syscon_device_lock_default;
|
|
|
|
METHOD void device_unlock {
|
|
device_t dev;
|
|
} DEFAULT syscon_device_unlock_default;
|
|
|
|
/**
|
|
* Get syscon handle from parent driver
|
|
*/
|
|
METHOD int get_handle {
|
|
device_t dev;
|
|
struct syscon **syscon;
|
|
} DEFAULT syscon_get_handle_default;
|