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: src/sys/dev/mmc/mmcbr_if.m,v 1.2 2007/05/26 05:23:36 imp Exp $ 54# 55 56#include <sys/types.h> 57#include <sys/bus.h> 58#include <bus/mmc/bridge.h> 59#include <bus/mmc/mmcreg.h> 60 61# 62# This is the interface that a mmc bridge chip gives to the mmc bus 63# that attaches to the mmc bridge. 64# 65 66INTERFACE mmcbr; 67 68# 69# Default implementations of some methods. 70# 71CODE { 72 static int 73 null_switch_vccq(device_t brdev __unused, device_t reqdev __unused) 74 { 75 76 return (0); 77 } 78}; 79 80# 81# Called by the mmcbus to set up the IO pins correctly, the common/core 82# supply voltage (VDD/VCC) to use for the device, the clock frequency, the 83# type of SPI chip select, power mode and bus width. 84# 85METHOD int update_ios { 86 device_t brdev; 87 device_t reqdev; 88}; 89 90# 91# Called by the mmcbus to switch the signaling voltage (VCCQ). 92# 93METHOD int switch_vccq { 94 device_t brdev; 95 device_t reqdev; 96} DEFAULT null_switch_vccq; 97 98# 99# Called by the mmcbus or its children to schedule a mmc request. These 100# requests are queued. Time passes. The bridge then gets notification 101# of the status of the request, who then notifies the requesting device 102# by calling the completion function supplied as part of the request. 103# 104METHOD int request { 105 device_t brdev; 106 device_t reqdev; 107 struct mmc_request *req; 108}; 109 110# 111# Called by mmcbus to get the read only status bits. 112# 113METHOD int get_ro { 114 device_t brdev; 115 device_t reqdev; 116}; 117 118# 119# Claim the current bridge, blocking the current thread until the host 120# is no longer busy. 121# 122METHOD int acquire_host { 123 device_t brdev; 124 device_t reqdev; 125} 126 127# 128# Release the current bridge. 129# 130METHOD int release_host { 131 device_t brdev; 132 device_t reqdev; 133} 134