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 */
  36 struct 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 */
  49 struct mcfqspi_platform_data {
  50         s16     bus_num;
  51         u16     num_chipselect;
  52         struct mcfqspi_cs_control *cs_control;
  53 };
  54
  55 #endif /* mcfqspi_h */