u-boot/common/cmd_dcr.c
Simon Glass 4c12eeb8b5 Convert cmd_usage() calls in common to use a return value
Change all files in common/ to use CMD_RET_USAGE instead of calling
cmd_usage() directly. I'm not completely sure about this patch since
the code since impact is small (100 byte or so on ARM) and it might
need splitting into smaller patches. But for now here it is.

Signed-off-by: Simon Glass <sjg@chromium.org>
2012-03-06 21:09:46 +01:00

237 lines
6.7 KiB
C

/*
* (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
*/
/*
* AMCC 4XX DCR Functions
*/
#include <common.h>
#include <config.h>
#include <command.h>
unsigned long get_dcr (unsigned short);
unsigned long set_dcr (unsigned short, unsigned long);
/* =======================================================================
* Interpreter command to retrieve an AMCC PPC 4xx Device Control Register
* =======================================================================
*/
int do_getdcr ( cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[] )
{
unsigned short dcrn; /* Device Control Register Num */
unsigned long value; /* DCR's value */
unsigned long get_dcr (unsigned short);
/* Validate arguments */
if (argc < 2)
return CMD_RET_USAGE;
/* Get a DCR */
dcrn = (unsigned short) simple_strtoul (argv[1], NULL, 16);
value = get_dcr (dcrn);
printf ("%04x: %08lx\n", dcrn, value);
return 0;
}
/* ======================================================================
* Interpreter command to set an AMCC PPC 4xx Device Control Register
* ======================================================================
*/
int do_setdcr (cmd_tbl_t * cmdtp, int flag, int argc, char * const argv[])
{
unsigned short dcrn; /* Device Control Register Num */
unsigned long value;
/* DCR's value */
int nbytes;
/* Validate arguments */
if (argc < 2)
return CMD_RET_USAGE;
/* 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;
}
/* =======================================================================
* Interpreter command to retrieve an register value through AMCC PPC 4xx
* Device Control Register inderect addressing.
* =======================================================================
*/
int do_getidcr (cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
{
unsigned short adr_dcrn; /* Device Control Register Num for Address */
unsigned short dat_dcrn; /* Device Control Register Num for Data */
unsigned short offset; /* Register's offset */
unsigned long value; /* Register's value */
char *ptr = NULL;
char buf[80];
/* Validate arguments */
if (argc < 3)
return CMD_RET_USAGE;
/* Find out whether ther is '.' (dot) symbol in the first parameter. */
strncpy (buf, argv[1], sizeof(buf)-1);
buf[sizeof(buf)-1] = 0; /* will guarantee zero-end string */
ptr = strchr (buf, '.');
if (ptr != NULL) {
/* First parameter has format adr_dcrn.dat_dcrn */
*ptr++ = 0; /* erase '.', create zero-end string */
adr_dcrn = (unsigned short) simple_strtoul (buf, NULL, 16);
dat_dcrn = (unsigned short) simple_strtoul (ptr, NULL, 16);
} else {
/*
* First parameter has format adr_dcrn; dat_dcrn will be
* calculated as adr_dcrn+1.
*/
adr_dcrn = (unsigned short) simple_strtoul (buf, NULL, 16);
dat_dcrn = adr_dcrn+1;
}
/* Register's offset */
offset = (unsigned short) simple_strtoul (argv[2], NULL, 16);
/* Disable interrupts */
disable_interrupts ();
/* Set offset */
set_dcr (adr_dcrn, offset);
/* get data */
value = get_dcr (dat_dcrn);
/* Enable interrupts */
enable_interrupts ();
printf ("%04x.%04x-%04x Read %08lx\n", adr_dcrn, dat_dcrn, offset, value);
return 0;
}
/* =======================================================================
* Interpreter command to update an register value through AMCC PPC 4xx
* Device Control Register inderect addressing.
* =======================================================================
*/
int do_setidcr (cmd_tbl_t * cmdtp, int flag, int argc, char * const argv[])
{
unsigned short adr_dcrn; /* Device Control Register Num for Address */
unsigned short dat_dcrn; /* Device Control Register Num for Data */
unsigned short offset; /* Register's offset */
unsigned long value; /* Register's value */
char *ptr = NULL;
char buf[80];
/* Validate arguments */
if (argc < 4)
return CMD_RET_USAGE;
/* Find out whether ther is '.' (dot) symbol in the first parameter. */
strncpy (buf, argv[1], sizeof(buf)-1);
buf[sizeof(buf)-1] = 0; /* will guarantee zero-end string */
ptr = strchr (buf, '.');
if (ptr != NULL) {
/* First parameter has format adr_dcrn.dat_dcrn */
*ptr++ = 0; /* erase '.', create zero-end string */
adr_dcrn = (unsigned short) simple_strtoul (buf, NULL, 16);
dat_dcrn = (unsigned short) simple_strtoul (ptr, NULL, 16);
} else {
/*
* First parameter has format adr_dcrn; dat_dcrn will be
* calculated as adr_dcrn+1.
*/
adr_dcrn = (unsigned short) simple_strtoul (buf, NULL, 16);
dat_dcrn = adr_dcrn+1;
}
/* Register's offset */
offset = (unsigned short) simple_strtoul (argv[2], NULL, 16);
/* New value */
value = (unsigned long) simple_strtoul (argv[3], NULL, 16);
/* Disable interrupts */
disable_interrupts ();
/* Set offset */
set_dcr (adr_dcrn, offset);
/* set data */
set_dcr (dat_dcrn, value);
/* Enable interrupts */
enable_interrupts ();
printf ("%04x.%04x-%04x Write %08lx\n", adr_dcrn, dat_dcrn, offset, value);
return 0;
}
/***************************************************/
U_BOOT_CMD(
getdcr, 2, 1, do_getdcr,
"Get an AMCC PPC 4xx DCR's value",
"dcrn - return a DCR's value."
);
U_BOOT_CMD(
setdcr, 2, 1, do_setdcr,
"Set an AMCC PPC 4xx DCR's value",
"dcrn - set a DCR's value."
);
U_BOOT_CMD(
getidcr, 3, 1, do_getidcr,
"Get a register value via indirect DCR addressing",
"adr_dcrn[.dat_dcrn] offset - write offset to adr_dcrn, read value from dat_dcrn."
);
U_BOOT_CMD(
setidcr, 4, 1, do_setidcr,
"Set a register value via indirect DCR addressing",
"adr_dcrn[.dat_dcrn] offset value - write offset to adr_dcrn, write value to dat_dcrn."
);