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# 53 54#include <sys/types.h> 55#include <dev/mmc/mmcreg.h> 56 57# 58# This is the interface that a mmc bridge chip gives to the mmc bus 59# that attaches to the mmc bridge. 60# 61 62INTERFACE mmcbr; 63 64# 65# Default implementations of some methods. 66# 67CODE { 68 static int 69 null_switch_vccq(device_t brdev __unused, device_t reqdev __unused) 70 { 71 72 return (0); 73 } 74 75 static int 76 null_retune(device_t brdev __unused, device_t reqdev __unused, 77 bool reset __unused) 78 { 79 80 return (0); 81 } 82 83 static int 84 null_tune(device_t brdev __unused, device_t reqdev __unused, 85 bool hs400 __unused) 86 { 87 88 return (0); 89 } 90}; 91 92# 93# Called by the mmcbus to set up the IO pins correctly, the common/core 94# supply voltage (VDD/VCC) to use for the device, the clock frequency, the 95# type of SPI chip select, power mode and bus width. 96# 97METHOD int update_ios { 98 device_t brdev; 99 device_t reqdev; 100}; 101 102# 103# Called by the mmcbus to switch the signaling voltage (VCCQ). 104# 105METHOD int switch_vccq { 106 device_t brdev; 107 device_t reqdev; 108} DEFAULT null_switch_vccq; 109 110# 111# Called by the mmcbus with the bridge claimed to execute initial tuning. 112# 113METHOD int tune { 114 device_t brdev; 115 device_t reqdev; 116 bool hs400; 117} DEFAULT null_tune; 118 119# 120# Called by the mmcbus with the bridge claimed to execute re-tuning. 121# 122METHOD int retune { 123 device_t brdev; 124 device_t reqdev; 125 bool reset; 126} DEFAULT null_retune; 127 128# 129# Called by the mmcbus or its children to schedule a mmc request. These 130# requests are queued. Time passes. The bridge then gets notification 131# of the status of the request, who then notifies the requesting device 132# by calling the completion function supplied as part of the request. 133# Requires the bridge to be claimed. 134# 135METHOD int request { 136 device_t brdev; 137 device_t reqdev; 138 struct mmc_request *req; 139}; 140 141# 142# Called by mmcbus to get the read only status bits. 143# 144METHOD int get_ro { 145 device_t brdev; 146 device_t reqdev; 147}; 148 149# 150# Claim the current bridge, blocking the current thread until the host 151# is no longer busy. 152# 153METHOD int acquire_host { 154 device_t brdev; 155 device_t reqdev; 156}; 157 158# 159# Release the current bridge. 160# 161METHOD int release_host { 162 device_t brdev; 163 device_t reqdev; 164}; 165