1#- 2# Copyright (c) 2015 Michal Meloun 3# All rights reserved. 4# 5# Redistribution and use in source and binary forms, with or without 6# modification, are permitted provided that the following conditions 7# are met: 8# 1. Redistributions of source code must retain the above copyright 9# notice, this list of conditions and the following disclaimer. 10# 2. Redistributions in binary form must reproduce the above copyright 11# notice, this list of conditions and the following disclaimer in the 12# documentation and/or other materials provided with the distribution. 13# 14# THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 15# ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 16# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 17# ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 18# FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 19# DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 20# OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 21# HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 22# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 23# OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 24# SUCH DAMAGE. 25# 26# $FreeBSD$ 27# 28 29#include <machine/bus.h> 30 31INTERFACE syscon; 32 33HEADER { 34 struct syscon; 35 int syscon_get_handle_default(device_t dev, struct syscon **syscon); 36} 37 38CODE { 39 #include <sys/systm.h> 40 #include <sys/bus.h> 41 42 int 43 syscon_get_handle_default(device_t dev, struct syscon **syscon) 44 { 45 device_t parent; 46 47 parent = device_get_parent(dev); 48 if (parent == NULL) 49 return (ENODEV); 50 return (SYSCON_GET_HANDLE(parent, syscon)); 51 } 52 53 static void 54 syscon_device_lock_default(device_t dev) 55 { 56 57 panic("syscon_device_lock is not implemented"); 58 }; 59 60 static void 61 syscon_device_unlock_default(device_t dev) 62 { 63 64 panic("syscon_device_unlock is not implemented"); 65 }; 66} 67 68METHOD int init { 69 struct syscon *syscon; 70}; 71 72METHOD int uninit { 73 struct syscon *syscon; 74}; 75 76/** 77 * Accessor functions for syscon register space 78 */ 79METHOD uint32_t read_4 { 80 struct syscon *syscon; 81 bus_size_t offset; 82}; 83 84METHOD int write_4 { 85 struct syscon *syscon; 86 bus_size_t offset; 87 uint32_t val; 88}; 89 90METHOD int modify_4 { 91 struct syscon *syscon; 92 bus_size_t offset; 93 uint32_t clear_bits; 94 uint32_t set_bits; 95}; 96 97/** 98 * Unlocked verion of access function 99 */ 100METHOD uint32_t unlocked_read_4 { 101 struct syscon *syscon; 102 bus_size_t offset; 103}; 104 105METHOD int unlocked_write_4 { 106 struct syscon *syscon; 107 bus_size_t offset; 108 uint32_t val; 109}; 110 111METHOD int unlocked_modify_4 { 112 struct syscon *syscon; 113 bus_size_t offset; 114 uint32_t clear_bits; 115 uint32_t set_bits; 116}; 117 118/** 119* Locking for exclusive access to underlying device 120*/ 121METHOD void device_lock { 122 device_t dev; 123} DEFAULT syscon_device_lock_default; 124 125METHOD void device_unlock { 126 device_t dev; 127} DEFAULT syscon_device_unlock_default; 128 129/** 130 * Get syscon handle from parent driver 131 */ 132METHOD int get_handle { 133 device_t dev; 134 struct syscon **syscon; 135} DEFAULT syscon_get_handle_default; 136