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/*
* This file is part of the flashrom project.
*
* Copyright (C) 2007, 2008, 2009, 2010, 2011 Carl-Daniel Hailfinger
* Copyright (C) 2008 coresystems GmbH
*
* 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.
*/
/*
* Contains the generic SPI framework
*/
#include <strings.h>
#include <string.h>
#include "flash.h"
#include "flashchips.h"
#include "chipdrivers.h"
#include "programmer.h"
#include "spi.h"
int spi_send_command(struct flashctx *flash, unsigned int writecnt,
unsigned int readcnt, const unsigned char *writearr,
unsigned char *readarr)
{
return flash->mst->spi.command(flash, writecnt, readcnt, writearr,
readarr);
}
int spi_send_multicommand(struct flashctx *flash, struct spi_command *cmds)
{
return flash->mst->spi.multicommand(flash, cmds);
}
int default_spi_send_command(struct flashctx *flash, unsigned int writecnt,
unsigned int readcnt,
const unsigned char *writearr,
unsigned char *readarr)
{
struct spi_command cmd[] = {
{
.writecnt = writecnt,
.readcnt = readcnt,
.writearr = writearr,
.readarr = readarr,
}, {
.writecnt = 0,
.writearr = NULL,
.readcnt = 0,
.readarr = NULL,
}};
return spi_send_multicommand(flash, cmd);
}
int default_spi_send_multicommand(struct flashctx *flash,
struct spi_command *cmds)
{
int result = 0;
for (; (cmds->writecnt || cmds->readcnt) && !result; cmds++) {
result = spi_send_command(flash, cmds->writecnt, cmds->readcnt,
cmds->writearr, cmds->readarr);
}
return result;
}
int default_spi_read(struct flashctx *flash, uint8_t *buf, unsigned int start,
unsigned int len)
{
unsigned int max_data = flash->mst->spi.max_data_read;
if (max_data == MAX_DATA_UNSPECIFIED) {
msg_perr("%s called, but SPI read chunk size not defined "
"on this hardware. Please report a bug at "
"flashrom@flashrom.org\n", __func__);
return 1;
}
return spi_read_chunked(flash, buf, start, len, max_data);
}
int default_spi_write_256(struct flashctx *flash, const uint8_t *buf, unsigned int start, unsigned int len)
{
unsigned int max_data = flash->mst->spi.max_data_write;
if (max_data == MAX_DATA_UNSPECIFIED) {
msg_perr("%s called, but SPI write chunk size not defined "
"on this hardware. Please report a bug at "
"flashrom@flashrom.org\n", __func__);
return 1;
}
return spi_write_chunked(flash, buf, start, len, max_data);
}
int spi_chip_read(struct flashctx *flash, uint8_t *buf, unsigned int start,
unsigned int len)
{
int ret;
size_t to_read;
for (; len; len -= to_read, buf += to_read, start += to_read) {
/* Do not cross 16MiB boundaries in a single transfer.
This helps with
o multi-die 4-byte-addressing chips,
o dediprog that has a protocol limit of 32MiB-512B. */
to_read = min(ALIGN_DOWN(start + 16*MiB, 16*MiB) - start, len);
ret = flash->mst->spi.read(flash, buf, start, to_read);
if (ret)
return ret;
}
return 0;
}
/*
* Program chip using page (256 bytes) programming.
* Some SPI masters can't do this, they use single byte programming instead.
* The redirect to single byte programming is achieved by setting
* .write_256 = spi_chip_write_1
*/
/* real chunksize is up to 256, logical chunksize is 256 */
int spi_chip_write_256(struct flashctx *flash, const uint8_t *buf, unsigned int start, unsigned int len)
{
return flash->mst->spi.write_256(flash, buf, start, len);
}
int spi_aai_write(struct flashctx *flash, const uint8_t *buf, unsigned int start, unsigned int len)
{
return flash->mst->spi.write_aai(flash, buf, start, len);
}
int register_spi_master(const struct spi_master *mst)
{
struct registered_master rmst;
if (!mst->write_aai || !mst->write_256 || !mst->read || !mst->command ||
!mst->multicommand ||
((mst->command == default_spi_send_command) &&
(mst->multicommand == default_spi_send_multicommand))) {
msg_perr("%s called with incomplete master definition. "
"Please report a bug at flashrom@flashrom.org\n",
__func__);
return ERROR_FLASHROM_BUG;
}
rmst.buses_supported = BUS_SPI;
rmst.spi = *mst;
return register_master(&rmst);
}
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