xref: /freebsd/sys/dev/mmc/mmcbus_if.m (revision 42249ef2)
1#-
2# Copyright (c) 2006 M. Warner Losh
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# Portions of this software may have been developed with reference to
27# the SD Simplified Specification.  The following disclaimer may apply:
28#
29# The following conditions apply to the release of the simplified
30# specification ("Simplified Specification") by the SD Card Association and
31# the SD Group. The Simplified Specification is a subset of the complete SD
32# Specification which is owned by the SD Card Association and the SD
33# Group. This Simplified Specification is provided on a non-confidential
34# basis subject to the disclaimers below. Any implementation of the
35# Simplified Specification may require a license from the SD Card
36# Association, SD Group, SD-3C LLC or other third parties.
37#
38# Disclaimers:
39#
40# The information contained in the Simplified Specification is presented only
41# as a standard specification for SD Cards and SD Host/Ancillary products and
42# is provided "AS-IS" without any representations or warranties of any
43# kind. No responsibility is assumed by the SD Group, SD-3C LLC or the SD
44# Card Association for any damages, any infringements of patents or other
45# right of the SD Group, SD-3C LLC, the SD Card Association or any third
46# parties, which may result from its use. No license is granted by
47# implication, estoppel or otherwise under any patent or other rights of the
48# SD Group, SD-3C LLC, the SD Card Association or any third party. Nothing
49# herein shall be construed as an obligation by the SD Group, the SD-3C LLC
50# or the SD Card Association to disclose or distribute any technical
51# information, know-how or other confidential information to any third party.
52#
53# $FreeBSD$
54#
55
56#include <sys/types.h>
57#include <dev/mmc/mmcreg.h>
58
59#
60# This is the set of callbacks that the MMC subroutines and the mmc/sd card
61# driver call into the bus to make requests.
62#
63
64INTERFACE mmcbus;
65
66#
67# Pause re-tuning, optionally with triggering re-tuning up-front.  Requires
68# the bus to be claimed.
69#
70METHOD void retune_pause {
71	device_t	busdev;
72	device_t	reqdev;
73	bool		retune;
74};
75
76#
77# Unpause re-tuning.  Requires the bus to be claimed.
78#
79METHOD void retune_unpause {
80	device_t	busdev;
81	device_t	reqdev;
82};
83
84#
85# Queue and wait for a request.  Requires the bus to be claimed.
86#
87METHOD int wait_for_request {
88	device_t	busdev;
89	device_t	reqdev;
90	struct mmc_request *req;
91};
92
93#
94# Claim the current bus, blocking the current thread until the host is no
95# longer busy.
96#
97METHOD int acquire_bus {
98	device_t	busdev;
99	device_t	reqdev;
100};
101
102#
103# Release the current bus.
104#
105METHOD int release_bus {
106	device_t	busdev;
107	device_t	reqdev;
108};
109