xref: /freebsd/sys/dev/mmc/mmcbus_if.m (revision b077aed33b7b6aefca7b17ddb250cf521f938613)
1#-
2# Copyright (c) 2006 M. Warner Losh <imp@FreeBSD.org>
3#
4# Redistribution and use in source and binary forms, with or without
5# modification, are permitted provided that the following conditions
6# are met:
7# 1. Redistributions of source code must retain the above copyright
8#    notice, this list of conditions and the following disclaimer.
9# 2. Redistributions in binary form must reproduce the above copyright
10#    notice, this list of conditions and the following disclaimer in the
11#    documentation and/or other materials provided with the distribution.
12#
13# THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
14# ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
15# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
16# ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
17# FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
18# DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
19# OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
20# HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
21# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
22# OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
23# SUCH DAMAGE.
24#
25# Portions of this software may have been developed with reference to
26# the SD Simplified Specification.  The following disclaimer may apply:
27#
28# The following conditions apply to the release of the simplified
29# specification ("Simplified Specification") by the SD Card Association and
30# the SD Group. The Simplified Specification is a subset of the complete SD
31# Specification which is owned by the SD Card Association and the SD
32# Group. This Simplified Specification is provided on a non-confidential
33# basis subject to the disclaimers below. Any implementation of the
34# Simplified Specification may require a license from the SD Card
35# Association, SD Group, SD-3C LLC or other third parties.
36#
37# Disclaimers:
38#
39# The information contained in the Simplified Specification is presented only
40# as a standard specification for SD Cards and SD Host/Ancillary products and
41# is provided "AS-IS" without any representations or warranties of any
42# kind. No responsibility is assumed by the SD Group, SD-3C LLC or the SD
43# Card Association for any damages, any infringements of patents or other
44# right of the SD Group, SD-3C LLC, the SD Card Association or any third
45# parties, which may result from its use. No license is granted by
46# implication, estoppel or otherwise under any patent or other rights of the
47# SD Group, SD-3C LLC, the SD Card Association or any third party. Nothing
48# herein shall be construed as an obligation by the SD Group, the SD-3C LLC
49# or the SD Card Association to disclose or distribute any technical
50# information, know-how or other confidential information to any third party.
51#
52# $FreeBSD$
53#
54
55#include <sys/types.h>
56#include <dev/mmc/mmcreg.h>
57
58#
59# This is the set of callbacks that the MMC subroutines and the mmc/sd card
60# driver call into the bus to make requests.
61#
62
63INTERFACE mmcbus;
64
65#
66# Pause re-tuning, optionally with triggering re-tuning up-front.  Requires
67# the bus to be claimed.
68#
69METHOD void retune_pause {
70	device_t	busdev;
71	device_t	reqdev;
72	bool		retune;
73};
74
75#
76# Unpause re-tuning.  Requires the bus to be claimed.
77#
78METHOD void retune_unpause {
79	device_t	busdev;
80	device_t	reqdev;
81};
82
83#
84# Queue and wait for a request.  Requires the bus to be claimed.
85#
86METHOD int wait_for_request {
87	device_t	busdev;
88	device_t	reqdev;
89	struct mmc_request *req;
90};
91
92#
93# Claim the current bus, blocking the current thread until the host is no
94# longer busy.
95#
96METHOD int acquire_bus {
97	device_t	busdev;
98	device_t	reqdev;
99};
100
101#
102# Release the current bus.
103#
104METHOD int release_bus {
105	device_t	busdev;
106	device_t	reqdev;
107};
108