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/*
* This file is part of the flashrom project.
*
* Copyright (C) 2012 Virgil-Adrian Teaca
*
* 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
*/
/* Driver for the SI-Prog like hardware by Lancos.com.
* See http://www.lancos.com/siprogsch.html for schematics and instructions.
*/
#include <stdlib.h>
#include <string.h>
#include "flash.h"
#include "programmer.h"
/* We have:
MOSI -----> DTR
MISO -----> CTS
SCK --+--> RTS
+--> DSR
CS# -----> TXD
*/
enum pony_type {
TYPE_SI_PROG,
TYPE_SERBANG,
};
/* The hardware programmer used. */
static enum pony_type pony_type = TYPE_SI_PROG;
static void pony_bitbang_set_cs(int val)
{
if (pony_type == TYPE_SI_PROG)
{
/* CS# is negated by the SI-Prog programmer. */
val ^= 1;
}
sp_set_pin(PIN_TXD, val);
}
static void pony_bitbang_set_sck(int val)
{
sp_set_pin(PIN_RTS, val);
}
static void pony_bitbang_set_mosi(int val)
{
sp_set_pin(PIN_DTR, val);
}
static int pony_bitbang_get_miso(void)
{
int tmp;
tmp = sp_get_pin(PIN_CTS);
if (pony_type == TYPE_SERBANG)
{
/* MISO is negated by the SERBANG programmer. */
tmp ^= 1;
}
return tmp;
}
static const struct bitbang_spi_master bitbang_spi_master_pony = {
.type = BITBANG_SPI_MASTER_PONY,
.set_cs = pony_bitbang_set_cs,
.set_sck = pony_bitbang_set_sck,
.set_mosi = pony_bitbang_set_mosi,
.get_miso = pony_bitbang_get_miso,
.half_period = 0,
};
int pony_spi_init(void)
{
char *arg = NULL;
int i, data_in, data_out, have_device = 0;
int have_prog = 1;
/* The parameter is on format "dev=/dev/device,type=serbang" */
arg = extract_programmer_param("dev");
if (arg && strlen(arg)) {
sp_fd = sp_openserport( arg, 9600 );
have_device++;
}
free(arg);
if (!have_device) {
msg_perr("Error: No valid device specified.\n"
"Use flashrom -p pony_spi:dev=/dev/device\n");
return 1;
}
/* Register the shutdown callback. */
if (register_shutdown(serialport_shutdown, NULL)) {
return 1;
}
arg = extract_programmer_param("type");
if (arg) {
if (!strcasecmp( arg, "serbang")) {
pony_type = TYPE_SERBANG;
} else if (!strcasecmp( arg, "si_prog") ) {
pony_type = TYPE_SI_PROG;
} else {
msg_perr("Error: Invalid programmer type specified.\n");
free(arg);
return 1;
}
}
free(arg);
msg_pdbg("Using the %s programmer.\n", ((pony_type == TYPE_SI_PROG ) ? "SI-Prog" : "SERBANG"));
/*
* Detect if there is a SI-Prog compatible programmer connected.
*/
pony_bitbang_set_cs(1);
pony_bitbang_set_mosi(1);
/* We toggle SCK while we keep MOSI and CS# on. */
for (i = 1; i <= 10; ++i) {
data_out = i & 1;
sp_set_pin(PIN_RTS, data_out);
programmer_delay( 1000 );
data_in = sp_get_pin(PIN_DSR);
if (data_out != data_in) {
have_prog = 0;
break;
}
}
if (!have_prog) {
msg_perr( "No SI-Prog compatible hardware detected.\n" );
return 1;
}
if (bitbang_spi_init(&bitbang_spi_master_pony)) {
return 1;
}
return 0;
}
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