u-boot/common/cmd_dcr.c

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/*
* (C) Copyright 2001
* Erik Theisen, Wave 7 Optics, etheisen@mindspring.com.
*
* See file CREDITS for list of people who contributed to this
* project.
*
* 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
*/
/*
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* AMCC 4XX DCR Functions
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*/
#include <common.h>
#include <config.h>
#include <command.h>
#if defined(CONFIG_4xx) && (CONFIG_COMMANDS & CFG_CMD_SETGETDCR)
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/* =======================================================================
* Interpreter command to retrieve an AMCC PPC 4xx Device Control Register
* =======================================================================
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*/
int do_getdcr ( cmd_tbl_t *cmdtp, int flag, int argc, char *argv[] )
{
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unsigned short dcrn; /* Device Control Register Num */
unsigned long value; /* DCR's value */
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unsigned long get_dcr (unsigned short);
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/* Validate arguments */
if (argc < 2) {
printf ("Usage:\n%s\n", cmdtp->usage);
return 1;
}
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/* Get a DCR */
dcrn = (unsigned short) simple_strtoul (argv[1], NULL, 16);
value = get_dcr (dcrn);
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printf ("%04x: %08lx\n", dcrn, value);
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return 0;
}
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/* ======================================================================
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* Interpreter command to set an AMCC PPC 4xx Device Control Register
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* ======================================================================
*/
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int do_setdcr (cmd_tbl_t * cmdtp, int flag, int argc, char *argv[])
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{
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unsigned long get_dcr (unsigned short);
unsigned long set_dcr (unsigned short, unsigned long);
unsigned short dcrn; /* Device Control Register Num */
unsigned long value;
/* DCR's value */
int nbytes;
extern char console_buffer[];
/* Validate arguments */
if (argc < 2) {
printf ("Usage:\n%s\n", cmdtp->usage);
return 1;
}
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/* Set a DCR */
dcrn = (unsigned short) simple_strtoul (argv[1], NULL, 16);
do {
value = get_dcr (dcrn);
printf ("%04x: %08lx", dcrn, value);
nbytes = readline (" ? ");
if (nbytes == 0) {
/*
* <CR> pressed as only input, don't modify current
* location and exit command.
*/
nbytes = 1;
return 0;
} else {
unsigned long i;
char *endp;
i = simple_strtoul (console_buffer, &endp, 16);
nbytes = endp - console_buffer;
if (nbytes)
set_dcr (dcrn, i);
}
} while (nbytes);
return 0;
}
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/***************************************************/
U_BOOT_CMD(
getdcr, 2, 1, do_getdcr,
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"getdcr - Get an AMCC PPC 4xx DCR's value\n",
"dcrn - return a DCR's value.\n"
);
U_BOOT_CMD(
setdcr, 2, 1, do_setdcr,
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"setdcr - Set an AMCC PPC 4xx DCR's value\n",
"dcrn - set a DCR's value.\n"
);
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#endif /* CONFIG_4xx & CFG_CMD_SETGETDCR */