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Add opaque programmer registration infrastructure

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An opaque programmer does not allow direct flash access and only offers
abstract probe/read/erase/write methods.
Due to that, opaque programmers need their own infrastructure and
registration framework.

Corresponding to flashrom svn r1459.

Signed-off-by: Carl-Daniel Hailfinger <c-d.hailfinger.devel.2006@gmx.net>
Acked-by: Michael Karcher <flashrom@mkarcher.dialup.fu-berlin.de>
This commit is contained in:
Carl-Daniel Hailfinger
2011-11-04 21:35:26 +00:00
parent b992d34339
commit 532c717bcc
8 changed files with 150 additions and 5 deletions
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99
opaque.c Normal file
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/*
* This file is part of the flashrom project.
*
* Copyright (C) 2011 Carl-Daniel Hailfinger
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; version 2 of the License.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*/
/*
* Contains the opaque programmer framework.
* An opaque programmer is a programmer which does not provide direct access
* to the flash chip and which abstracts all flash chip properties into a
* programmer specific interface.
*/
#include <stdint.h>
#include "flash.h"
#include "flashchips.h"
#include "chipdrivers.h"
#include "programmer.h"
const struct opaque_programmer opaque_programmer_none = {
.max_data_read = MAX_DATA_UNSPECIFIED,
.max_data_write = MAX_DATA_UNSPECIFIED,
.probe = NULL,
.read = NULL,
.write = NULL,
.erase = NULL,
};
const struct opaque_programmer *opaque_programmer = &opaque_programmer_none;
int probe_opaque(struct flashchip *flash)
{
if (!opaque_programmer->probe) {
msg_perr("%s called before register_opaque_programmer. "
"Please report a bug at flashrom@flashrom.org\n",
__func__);
return 0;
}
return opaque_programmer->probe(flash);
}
int read_opaque(struct flashchip *flash, uint8_t *buf, int start, int len)
{
if (!opaque_programmer->read) {
msg_perr("%s called before register_opaque_programmer. "
"Please report a bug at flashrom@flashrom.org\n",
__func__);
return 1;
}
return opaque_programmer->read(flash, buf, start, len);
}
int write_opaque(struct flashchip *flash, uint8_t *buf, int start, int len)
{
if (!opaque_programmer->write) {
msg_perr("%s called before register_opaque_programmer. "
"Please report a bug at flashrom@flashrom.org\n",
__func__);
return 1;
}
return opaque_programmer->write(flash, buf, start, len);
}
int erase_opaque(struct flashchip *flash, unsigned int blockaddr, unsigned int blocklen)
{
if (!opaque_programmer->erase) {
msg_perr("%s called before register_opaque_programmer. "
"Please report a bug at flashrom@flashrom.org\n",
__func__);
return 1;
}
return opaque_programmer->erase(flash, blockaddr, blocklen);
}
void register_opaque_programmer(const struct opaque_programmer *pgm)
{
if (!pgm->probe || !pgm->read || !pgm->write || !pgm->erase) {
msg_perr("%s called with one of probe/read/write/erase being "
"NULL. Please report a bug at flashrom@flashrom.org\n",
__func__);
return;
}
opaque_programmer = pgm;
buses_supported |= BUS_PROG;
}