include/nios2-epcs.h

   1 /*
   2  * (C) Copyright 2004, Psyent Corporation <www.psyent.com>
   3  * Scott McNutt <smcnutt@psyent.com>
   4  *
   5  * SPDX-License-Identifier:     GPL-2.0+
   6  */
   7
   8 /*************************************************************************
   9  * Altera Nios-II EPCS Controller Core interfaces
  10  ************************************************************************/
  11
  12 #ifndef __NIOS2_EPCS_H__
  13 #define __NIOS2_EPCS_H__
  14
  15 typedef struct epcs_devinfo_t {
  16         const char      *name;          /* Device name */
  17         unsigned char   id;             /* Device silicon id */
  18         unsigned char   size;           /* Total size log2(bytes)*/
  19         unsigned char   num_sects;      /* Number of sectors */
  20         unsigned char   sz_sect;        /* Sector size log2(bytes) */
  21         unsigned char   sz_page;        /* Page size log2(bytes) */
  22         unsigned char   prot_mask;      /* Protection mask */
  23 }epcs_devinfo_t;
  24
  25 /* Resets the epcs controller -- to prevent (potential) soft-reset
  26  * problems when booting from the epcs controller
  27  */
  28 extern int epcs_reset (void);
  29
  30 /* Returns the devinfo struct if EPCS device is found;
  31  * NULL otherwise.
  32  */
  33 extern epcs_devinfo_t *epcs_dev_find (void);
  34
  35 /* Returns the number of bytes used by config data.
  36  * Negative on error.
  37  */
  38 extern int epcs_cfgsz (void);
  39
  40 /* Erase sectors 'start' to 'end' - return zero on success
  41  */
  42 extern int epcs_erase (unsigned start, unsigned end);
  43
  44 /* Read 'cnt' bytes from device offset 'off' into buf at 'addr'
  45  * Zero return on success
  46  */
  47 extern int epcs_read (ulong addr, ulong off, ulong cnt);
  48
  49 /* Write 'cnt' bytes to device offset 'off' from buf at 'addr'.
  50  * Zero return on success
  51  */
  52 extern int epcs_write (ulong addr, ulong off, ulong cnt);
  53
  54 /* Verify 'cnt' bytes at device offset 'off' comparing with buf
  55  * at 'addr'. On failure, write first invalid offset to *err.
  56  * Zero return on success
  57  */
  58 extern int epcs_verify (ulong addr, ulong off, ulong cnt, ulong *err);
  59
  60 #endif /* __NIOS2_EPCS_H__ */