include/nios2-epcs.h

   1 /*
   2  * (C) Copyright 2004, Psyent Corporation <www.psyent.com>
   3  * Scott McNutt <smcnutt@psyent.com>
   4  *
   5  * See file CREDITS for list of people who contributed to this
   6  * project.
   7  *
   8  * This program is free software; you can redistribute it and/or
   9  * modify it under the terms of the GNU General Public License as
  10  * published by the Free Software Foundation; either version 2 of
  11  * the License, or (at your option) any later version.
  12  *
  13  * This program is distributed in the hope that it will be useful,
  14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16  * GNU General Public License for more details.
  17  *
  18  * You should have received a copy of the GNU General Public License
  19  * along with this program; if not, write to the Free Software
  20  * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
  21  * MA 02111-1307 USA
  22  */
  23
  24 /*************************************************************************
  25  * Altera Nios-II EPCS Controller Core interfaces
  26  ************************************************************************/
  27
  28 #ifndef __NIOS2_EPCS_H__
  29 #define __NIOS2_EPCS_H__
  30
  31 typedef struct epcs_devinfo_t {
  32         const char      *name;          /* Device name */
  33         unsigned char   id;             /* Device silicon id */
  34         unsigned char   size;           /* Total size log2(bytes)*/
  35         unsigned char   num_sects;      /* Number of sectors */
  36         unsigned char   sz_sect;        /* Sector size log2(bytes) */
  37         unsigned char   sz_page;        /* Page size log2(bytes) */
  38         unsigned char   prot_mask;      /* Protection mask */
  39 }epcs_devinfo_t;
  40
  41 /* Resets the epcs controller -- to prevent (potential) soft-reset
  42  * problems when booting from the epcs controller
  43  */
  44 extern int epcs_reset (void);
  45
  46 /* Returns the devinfo struct if EPCS device is found;
  47  * NULL otherwise.
  48  */
  49 extern epcs_devinfo_t *epcs_dev_find (void);
  50
  51 /* Returns the number of bytes used by config data.
  52  * Negative on error.
  53  */
  54 extern int epcs_cfgsz (void);
  55
  56 /* Erase sectors 'start' to 'end' - return zero on success
  57  */
  58 extern int epcs_erase (unsigned start, unsigned end);
  59
  60 /* Read 'cnt' bytes from device offset 'off' into buf at 'addr'
  61  * Zero return on success
  62  */
  63 extern int epcs_read (ulong addr, ulong off, ulong cnt);
  64
  65 /* Write 'cnt' bytes to device offset 'off' from buf at 'addr'.
  66  * Zero return on success
  67  */
  68 extern int epcs_write (ulong addr, ulong off, ulong cnt);
  69
  70 /* Verify 'cnt' bytes at device offset 'off' comparing with buf
  71  * at 'addr'. On failure, write first invalid offset to *err.
  72  * Zero return on success
  73  */
  74 extern int epcs_verify (ulong addr, ulong off, ulong cnt, ulong *err);
  75
  76 #endif /* __NIOS2_EPCS_H__ */