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https://github.com/brain-hackers/u-boot-brain
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1f6ce8f5ba
-When booting from an epcs controller, the epcs bootrom may leave the slave select in an asserted state causing soft reset hang. This patch ensures slave select is negated at reset. Patch by Scott McNutt, 08 Jun 2006
77 lines
2.5 KiB
C
77 lines
2.5 KiB
C
/*
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* (C) Copyright 2004, Psyent Corporation <www.psyent.com>
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* Scott McNutt <smcnutt@psyent.com>
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*
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* See file CREDITS for list of people who contributed to this
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* project.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation; either version 2 of
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* the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
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* MA 02111-1307 USA
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*/
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/*************************************************************************
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* Altera Nios-II EPCS Controller Core interfaces
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************************************************************************/
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#ifndef __NIOS2_EPCS_H__
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#define __NIOS2_EPCS_H__
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typedef struct epcs_devinfo_t {
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const char *name; /* Device name */
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unsigned char id; /* Device silicon id */
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unsigned char size; /* Total size log2(bytes)*/
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unsigned char num_sects; /* Number of sectors */
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unsigned char sz_sect; /* Sector size log2(bytes) */
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unsigned char sz_page; /* Page size log2(bytes) */
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unsigned char prot_mask; /* Protection mask */
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}epcs_devinfo_t;
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/* Resets the epcs controller -- to prevent (potential) soft-reset
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* problems when booting from the epcs controller
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*/
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extern int epcs_reset (void);
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/* Returns the devinfo struct if EPCS device is found;
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* NULL otherwise.
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*/
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extern epcs_devinfo_t *epcs_dev_find (void);
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/* Returns the number of bytes used by config data.
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* Negative on error.
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*/
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extern int epcs_cfgsz (void);
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/* Erase sectors 'start' to 'end' - return zero on success
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*/
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extern int epcs_erase (unsigned start, unsigned end);
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/* Read 'cnt' bytes from device offset 'off' into buf at 'addr'
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* Zero return on success
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*/
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extern int epcs_read (ulong addr, ulong off, ulong cnt);
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/* Write 'cnt' bytes to device offset 'off' from buf at 'addr'.
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* Zero return on success
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*/
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extern int epcs_write (ulong addr, ulong off, ulong cnt);
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/* Verify 'cnt' bytes at device offset 'off' comparing with buf
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* at 'addr'. On failure, write first invalid offset to *err.
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* Zero return on success
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*/
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extern int epcs_verify (ulong addr, ulong off, ulong cnt, ulong *err);
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#endif /* __NIOS2_EPCS_H__ */
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