LXR linux/arch/m68k/include/asm/mcfqspi.h

   1/*
   2 * Definitions for Freescale Coldfire QSPI module
   3 *
   4 * Copyright 2010 Steven King <sfking@fdwdc.com>
   5 *
   6 * This program is free software; you can redistribute it and/or modify
   7 * it under the terms of the GNU General Public License version 2
   8 * as published by the Free Software Foundation.
   9 *
  10 * This program is distributed in the hope that it will be useful,
  11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13 * GNU General Public License for more details.
  14 *
  15 * You should have received a copy of the GNU General Public License along
  16 * with this program; if not, write to the Free Software Foundation, Inc.,
  17 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  18 *
  19*/
  20
  21#ifndef mcfqspi_h
  22#define mcfqspi_h
  23
  24/**
  25 * struct mcfqspi_cs_control - chip select control for the coldfire qspi driver
  26 * @setup: setup the control; allocate gpio's, etc. May be NULL.
  27 * @teardown: finish with the control; free gpio's, etc. May be NULL.
  28 * @select: output the signals to select the device.  Can not be NULL.
  29 * @deselect: output the signals to deselect the device. Can not be NULL.
  30 *
  31 * The QSPI module has 4 hardware chip selects.  We don't use them.  Instead
  32 * platforms are required to supply a mcfqspi_cs_control as a part of the
  33 * platform data for each QSPI master controller.  Only the select and
  34 * deselect functions are required.
  35*/
  36struct mcfqspi_cs_control {
  37        int     (*setup)(struct mcfqspi_cs_control *);
  38        void    (*teardown)(struct mcfqspi_cs_control *);
  39        void    (*select)(struct mcfqspi_cs_control *, u8, bool);
  40        void    (*deselect)(struct mcfqspi_cs_control *, u8, bool);
  41};
  42
  43/**
  44 * struct mcfqspi_platform_data - platform data for the coldfire qspi driver
  45 * @bus_num: board specific identifier for this qspi driver.
  46 * @num_chipselects: number of chip selects supported by this qspi driver.
  47 * @cs_control: platform dependent chip select control.
  48*/
  49struct mcfqspi_platform_data {
  50        s16     bus_num;
  51        u16     num_chipselect;
  52        struct mcfqspi_cs_control *cs_control;
  53};
  54
  55#endif /* mcfqspi_h */
  56