c18f1e2627
- add MMC support. - add SDHC support. - add 4 and 8 bit bus width support. - add High Speed bus timing support.
139 lines
5.4 KiB
C
139 lines
5.4 KiB
C
/*-
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* Copyright (c) 2006 M. Warner Losh. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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* Portions of this software may have been developed with reference to
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* the SD Simplified Specification. The following disclaimer may apply:
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*
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* The following conditions apply to the release of the simplified
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* specification ("Simplified Specification") by the SD Card Association and
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* the SD Group. The Simplified Specification is a subset of the complete SD
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* Specification which is owned by the SD Card Association and the SD
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* Group. This Simplified Specification is provided on a non-confidential
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* basis subject to the disclaimers below. Any implementation of the
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* Simplified Specification may require a license from the SD Card
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* Association, SD Group, SD-3C LLC or other third parties.
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*
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* Disclaimers:
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*
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* The information contained in the Simplified Specification is presented only
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* as a standard specification for SD Cards and SD Host/Ancillary products and
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* is provided "AS-IS" without any representations or warranties of any
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* kind. No responsibility is assumed by the SD Group, SD-3C LLC or the SD
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* Card Association for any damages, any infringements of patents or other
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* right of the SD Group, SD-3C LLC, the SD Card Association or any third
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* parties, which may result from its use. No license is granted by
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* implication, estoppel or otherwise under any patent or other rights of the
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* SD Group, SD-3C LLC, the SD Card Association or any third party. Nothing
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* herein shall be construed as an obligation by the SD Group, the SD-3C LLC
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* or the SD Card Association to disclose or distribute any technical
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* information, know-how or other confidential information to any third party.
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*
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* $FreeBSD$
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*/
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#ifndef DEV_MMC_BRIDGE_H
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#define DEV_MMC_BRIDGE_H
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/*
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* This file defines interfaces for the mmc bridge. The names chosen
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* are similar to or the same as the names used in Linux to allow for
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* easy porting of what Linux calls mmc host drivers. I use the
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* FreeBSD terminology of bridge and bus for consistancy with other
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* drivers in the system. This file corresponds roughly to the Linux
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* linux/mmc/host.h file.
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*
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* A mmc bridge is a chipset that can have one or more mmc and/or sd
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* cards attached to it. mmc cards are attached on a bus topology,
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* while sd and sdio cards are attached using a star topology (meaning
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* in practice each sd card has its own, independent slot). Each
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* mmcbr is assumed to be derived from the mmcbr. This is done to
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* allow for easier addition of bridges (as each bridge does not need
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* to be added to the mmcbus file).
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*
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* Attached to the mmc bridge is an mmcbus. The mmcbus is described
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* in dev/mmc/bus.h.
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*/
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/*
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* mmc_ios is a structure that is used to store the state of the mmc/sd
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* bus configuration. This include the bus' clock speed, its voltage,
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* the bus mode for command output, the SPI chip select, some power
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* states and the bus width.
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*/
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enum mmc_vdd {
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vdd_150 = 0, vdd_155, vdd_160, vdd_165, vdd_170, vdd_180,
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vdd_190, vdd_200, vdd_210, vdd_220, vdd_230, vdd_240, vdd_250,
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vdd_260, vdd_270, vdd_280, vdd_290, vdd_300, vdd_310, vdd_320,
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vdd_330, vdd_340, vdd_350, vdd_360
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};
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enum mmc_power_mode {
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power_off = 0, power_up, power_on
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};
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enum mmc_bus_mode {
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opendrain = 1, pushpull
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};
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enum mmc_chip_select {
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cs_dontcare = 0, cs_high, cs_low
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};
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enum mmc_bus_width {
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bus_width_1 = 0, bus_width_4 = 2, bus_width_8 = 3
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};
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enum mmc_bus_timing {
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bus_timing_normal = 0, bus_timing_hs
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};
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struct mmc_ios {
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uint32_t clock; /* Speed of the clock in Hz to move data */
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enum mmc_vdd vdd; /* Voltage to apply to the power pins/ */
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enum mmc_bus_mode bus_mode;
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enum mmc_chip_select chip_select;
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enum mmc_bus_width bus_width;
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enum mmc_power_mode power_mode;
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enum mmc_bus_timing timing;
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};
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enum mmc_card_mode {
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mode_mmc, mode_sd
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};
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struct mmc_host {
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int f_min;
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int f_max;
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uint32_t host_ocr;
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uint32_t ocr;
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uint32_t caps;
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#define MMC_CAP_4_BIT_DATA (1 << 0) /* Can do 4-bit data transfers */
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#define MMC_CAP_8_BIT_DATA (1 << 1) /* Can do 8-bit data transfers */
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#define MMC_CAP_HSPEED (1 << 2) /* Can do High Speed transfers */
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enum mmc_card_mode mode;
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struct mmc_ios ios; /* Current state of the host */
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};
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#endif /* DEV_MMC_BRIDGE_H */
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