FreeBSD/Linux Kernel Cross Reference
sys/dev/mmc/bridge.h

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

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