mirror of
https://github.com/AsahiLinux/u-boot
synced 2024-11-26 14:40:41 +00:00
eb9401e3eb
Change behaviour of NetLoop(): return -1 for errors, filesize
otherwise; return code 0 is valid an means no file loaded - in this
case the environment still gets updated!
* Patches by Jon Diekema, 9 Nov 2002:
- improve ADC/DAC clocking on the SACSng board to align
the failing edges of LRCLK and SCLK
- sbc8260 configuration tweaks
- add status LED support for 82xx systems
- wire sspi/sspo commands into command handler; improved error
handlering
- add timestamp support and alternate memory test to the
SACSng configuration
133 lines
3.2 KiB
C
133 lines
3.2 KiB
C
/*
|
|
* (C) Copyright 2002
|
|
* Gerald Van Baren, Custom IDEAS, vanbaren@cideas.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
|
|
*/
|
|
|
|
/*
|
|
* SPI Read/Write Utilities
|
|
*/
|
|
|
|
#include <common.h>
|
|
#include <command.h>
|
|
#include <spi.h>
|
|
#include <cmd_spi.h>
|
|
|
|
#if (CONFIG_COMMANDS & CFG_CMD_SPI)
|
|
|
|
/*-----------------------------------------------------------------------
|
|
* Definitions
|
|
*/
|
|
|
|
#ifndef MAX_SPI_BYTES
|
|
# define MAX_SPI_BYTES 32 /* Maximum number of bytes we can handle */
|
|
#endif
|
|
|
|
/*
|
|
* External table of chip select functions (see the appropriate board
|
|
* support for the actual definition of the table).
|
|
*/
|
|
extern spi_chipsel_type spi_chipsel[];
|
|
extern int spi_chipsel_cnt;
|
|
|
|
/*
|
|
* Values from last command.
|
|
*/
|
|
static int device;
|
|
static int bitlen;
|
|
static uchar dout[MAX_SPI_BYTES];
|
|
static uchar din[MAX_SPI_BYTES];
|
|
|
|
/*
|
|
* SPI read/write
|
|
*
|
|
* Syntax:
|
|
* spi {dev} {num_bits} {dout}
|
|
* {dev} is the device number for controlling chip select (see TBD)
|
|
* {num_bits} is the number of bits to send & receive (base 10)
|
|
* {dout} is a hexadecimal string of data to send
|
|
* The command prints out the hexadecimal string received via SPI.
|
|
*/
|
|
|
|
int do_spi (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[])
|
|
{
|
|
char *cp = 0;
|
|
uchar tmp;
|
|
int j;
|
|
int rcode = 0;
|
|
|
|
/*
|
|
* We use the last specified parameters, unless new ones are
|
|
* entered.
|
|
*/
|
|
|
|
if ((flag & CMD_FLAG_REPEAT) == 0)
|
|
{
|
|
if (argc >= 2)
|
|
device = simple_strtoul(argv[1], NULL, 10);
|
|
if (argc >= 3)
|
|
bitlen = simple_strtoul(argv[2], NULL, 10);
|
|
if (argc >= 4) {
|
|
cp = argv[3];
|
|
for(j = 0; *cp; j++, cp++) {
|
|
tmp = *cp - '0';
|
|
if(tmp > 9)
|
|
tmp -= ('A' - '0') - 10;
|
|
if(tmp > 15)
|
|
tmp -= ('a' - 'A');
|
|
if(tmp > 15) {
|
|
printf("Hex conversion error on %c, giving up.\n", *cp);
|
|
return 1;
|
|
}
|
|
if((j % 2) == 0)
|
|
dout[j / 2] = (tmp << 4);
|
|
else
|
|
dout[j / 2] |= tmp;
|
|
}
|
|
}
|
|
}
|
|
|
|
if ((device < 0) || (device >= spi_chipsel_cnt)) {
|
|
printf("Invalid device %d, giving up.\n", device);
|
|
return 1;
|
|
}
|
|
if ((bitlen < 0) || (bitlen > (MAX_SPI_BYTES * 8))) {
|
|
printf("Invalid bitlen %d, giving up.\n", bitlen);
|
|
return 1;
|
|
}
|
|
|
|
debug ("spi_chipsel[%d] = %08X\n",
|
|
device, (uint)spi_chipsel[device]);
|
|
|
|
if(spi_xfer(spi_chipsel[device], bitlen, dout, din) != 0) {
|
|
printf("Error with the SPI transaction.\n");
|
|
rcode = 1;
|
|
} else {
|
|
cp = din;
|
|
for(j = 0; j < ((bitlen + 7) / 8); j++) {
|
|
printf("%02X", *cp++);
|
|
}
|
|
printf("\n");
|
|
}
|
|
|
|
return rcode;
|
|
}
|
|
|
|
#endif /* CFG_CMD_SPI */
|