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/**
* NXT bootstrap interface; NXT Bootstrap control functions.
*
* Copyright 2006 David Anderson <david.anderson@calixo.net>
*
* 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; either version 2 of the
* License, or (at your option) any later version.
*
* 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307
* USA
*/
#include <stdio.h>
#include <string.h>
#include "error.h"
#include "lowlevel.h"
#include "samba.h"
static nxt_error_t
nxt_format_command2(char *buf, char cmd,
nxt_addr_t addr, nxt_word_t word)
{
snprintf(buf, 20, "%c%08X,%08X#", cmd, addr, word);
return NXT_OK;
}
static nxt_error_t
nxt_format_command(char *buf, char cmd, nxt_addr_t addr)
{
snprintf(buf, 20, "%c%08X#", cmd, addr);
return NXT_OK;
}
static nxt_error_t
nxt_write_common(nxt_t *nxt, char type, nxt_addr_t addr, nxt_word_t w)
{
char buf[21] = {0};
NXT_ERR(nxt_format_command2(buf, type, addr, w));
NXT_ERR(nxt_send_str(nxt, buf));
return NXT_OK;
}
nxt_error_t
nxt_write_byte(nxt_t *nxt, nxt_addr_t addr, nxt_byte_t b)
{
return nxt_write_common(nxt, 'O', addr, b);
}
nxt_error_t
nxt_write_hword(nxt_t *nxt, nxt_addr_t addr, nxt_hword_t hw)
{
return nxt_write_common(nxt, 'H', addr, hw);
}
nxt_error_t
nxt_write_word(nxt_t *nxt, nxt_addr_t addr, nxt_word_t w)
{
return nxt_write_common(nxt, 'W', addr, w);
}
static nxt_error_t
nxt_read_common(nxt_t *nxt, char cmd, int len,
nxt_addr_t addr, nxt_word_t *word)
{
char buf[20] = {0};
nxt_word_t w;
NXT_ERR(nxt_format_command2(buf, cmd, addr, len));
NXT_ERR(nxt_send_str(nxt, buf));
NXT_ERR(nxt_recv_buf(nxt, buf, len));
w = *((nxt_word_t*)buf);
#ifdef _NXT_BIG_ENDIAN
/* The value returned is in little-endian byte ordering, so swap
bytes on a big-endian architecture. */
w = (((w & 0x000000FF) << 24) +
((w & 0x0000FF00) << 8) +
((w & 0x00FF0000) >> 8) +
((w & 0xFF000000) >> 24));
#endif /* _NXT_BIG_ENDIAN */
*word = w;
return NXT_OK;
}
nxt_error_t
nxt_read_byte(nxt_t *nxt, nxt_addr_t addr, nxt_byte_t *b)
{
nxt_word_t w;
NXT_ERR(nxt_read_common(nxt, 'o', 1, addr, &w));
*b = (nxt_byte_t)w;
return NXT_OK;
}
nxt_error_t
nxt_read_hword(nxt_t *nxt, nxt_addr_t addr, nxt_hword_t *hw)
{
nxt_word_t w;
NXT_ERR(nxt_read_common(nxt, 'h', 2, addr, &w));
*hw = (nxt_hword_t)w;
return NXT_OK;
}
nxt_error_t
nxt_read_word(nxt_t *nxt, nxt_addr_t addr, nxt_word_t *w)
{
return nxt_read_common(nxt, 'w', 4, addr, w);
}
nxt_error_t
nxt_send_file(nxt_t *nxt, nxt_addr_t addr, char *file, unsigned short len)
{
char buf[20];
NXT_ERR(nxt_format_command2(buf, 'S', addr, len));
NXT_ERR(nxt_send_str(nxt, buf));
NXT_ERR(nxt_send_buf(nxt, file, len));
return NXT_OK;
}
nxt_error_t
nxt_recv_file(nxt_t *nxt, nxt_addr_t addr, char *file, unsigned short len)
{
char buf[20];
NXT_ERR(nxt_format_command2(buf, 'R', addr, len));
NXT_ERR(nxt_send_str(nxt, buf));
NXT_ERR(nxt_recv_buf(nxt, file, len+1));
return NXT_OK;
}
nxt_error_t
nxt_jump(nxt_t *nxt, nxt_addr_t addr)
{
char buf[20];
NXT_ERR(nxt_format_command(buf, 'G', addr));
NXT_ERR(nxt_send_str(nxt, buf));
return NXT_OK;
}
nxt_error_t
nxt_samba_version(nxt_t *nxt, char *version)
{
char buf[3];
strcpy(buf, "V#");
NXT_ERR(nxt_send_str(nxt, buf));
NXT_ERR(nxt_recv_buf(nxt, version, 4));
version[4] = 0;
return NXT_OK;
}
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