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 #if defined(CONFIG_M523x) || defined(CONFIG_M527x) || defined(CONFIG_M528x)
  25 #define MCFQSPI_IOBASE          (MCF_IPSBAR + 0x340)
  26 #elif defined(CONFIG_M5249)
  27 #define MCFQSPI_IOBASE         (MCF_MBAR + 0x300)
  28 #elif defined(CONFIG_M520x)
  29 #define MCFQSPI_IOBASE         0xFC05C000
  30 #elif defined(CONFIG_M532x)
  31 #define MCFQSPI_IOBASE         0xFC058000
  32 #endif
  33 #define MCFQSPI_IOSIZE          0x40
  34
  35 /**
  36  * struct mcfqspi_cs_control - chip select control for the coldfire qspi driver
  37  * @setup: setup the control; allocate gpio's, etc. May be NULL.
  38  * @teardown: finish with the control; free gpio's, etc. May be NULL.
  39  * @select: output the signals to select the device.  Can not be NULL.
  40  * @deselect: output the signals to deselect the device. Can not be NULL.
  41  *
  42  * The QSPI module has 4 hardware chip selects.  We don't use them.  Instead
  43  * platforms are required to supply a mcfqspi_cs_control as a part of the
  44  * platform data for each QSPI master controller.  Only the select and
  45  * deselect functions are required.
  46 */
  47 struct mcfqspi_cs_control {
  48         int     (*setup)(struct mcfqspi_cs_control *);
  49         void    (*teardown)(struct mcfqspi_cs_control *);
  50         void    (*select)(struct mcfqspi_cs_control *, u8, bool);
  51         void    (*deselect)(struct mcfqspi_cs_control *, u8, bool);
  52 };
  53
  54 /**
  55  * struct mcfqspi_platform_data - platform data for the coldfire qspi driver
  56  * @bus_num: board specific identifier for this qspi driver.
  57  * @num_chipselects: number of chip selects supported by this qspi driver.
  58  * @cs_control: platform dependent chip select control.
  59 */
  60 struct mcfqspi_platform_data {
  61         s16     bus_num;
  62         u16     num_chipselect;
  63         struct mcfqspi_cs_control *cs_control;
  64 };
  65
  66 #endif /* mcfqspi_h */