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/**
* Copyright 2013 Freescale Semiconductor
* Author: Mingkai Hu <Mingkai.hu@freescale.com>
* Po Liu <Po.Liu@freescale.com>
*
* SPDX-License-Identifier: GPL-2.0+
*
* This file provides support for the board-specific CPLD used on some Freescale
* reference boards.
*
* The following macros need to be defined:
*
* CONFIG_SYS_CPLD_BASE - The virtual address of the base of the
* CPLD register map
*
*/
#include <common.h>
#include <command.h>
#include <asm/io.h>
#include "cpld.h"
/**
* Set the boot bank to the alternate bank
*/
void cpld_set_altbank(u8 banksel)
{
struct cpld_data *cpld_data = (void *)(CONFIG_SYS_CPLD_BASE);
u8 reg11;
reg11 = in_8(&cpld_data->flhcsr);
switch (banksel) {
case 1:
out_8(&cpld_data->flhcsr, (reg11 & CPLD_BANKSEL_MASK)
| CPLD_BANKSEL_EN | CPLD_SELECT_BANK1);
break;
case 2:
out_8(&cpld_data->flhcsr, (reg11 & CPLD_BANKSEL_MASK)
| CPLD_BANKSEL_EN | CPLD_SELECT_BANK2);
break;
case 3:
out_8(&cpld_data->flhcsr, (reg11 & CPLD_BANKSEL_MASK)
| CPLD_BANKSEL_EN | CPLD_SELECT_BANK3);
break;
case 4:
out_8(&cpld_data->flhcsr, (reg11 & CPLD_BANKSEL_MASK)
| CPLD_BANKSEL_EN | CPLD_SELECT_BANK4);
break;
default:
printf("Invalid value! [1-4]\n");
return;
}
udelay(100);
do_reset(NULL, 0, 0, NULL);
}
/**
* Set the boot bank to the default bank
*/
void cpld_set_defbank(void)
{
cpld_set_altbank(4);
}
#ifdef DEBUG
static void cpld_dump_regs(void)
{
struct cpld_data *cpld_data = (void *)(CONFIG_SYS_CPLD_BASE);
printf("chipid1 = 0x%02x\n", in_8(&cpld_data->chipid1));
printf("chipid2 = 0x%02x\n", in_8(&cpld_data->chipid2));
printf("hwver = 0x%02x\n", in_8(&cpld_data->hwver));
printf("cpldver = 0x%02x\n", in_8(&cpld_data->cpldver));
printf("rstcon = 0x%02x\n", in_8(&cpld_data->rstcon));
printf("flhcsr = 0x%02x\n", in_8(&cpld_data->flhcsr));
printf("wdcsr = 0x%02x\n", in_8(&cpld_data->wdcsr));
printf("wdkick = 0x%02x\n", in_8(&cpld_data->wdkick));
printf("fancsr = 0x%02x\n", in_8(&cpld_data->fancsr));
printf("ledcsr = 0x%02x\n", in_8(&cpld_data->ledcsr));
printf("misc = 0x%02x\n", in_8(&cpld_data->misccsr));
printf("bootor = 0x%02x\n", in_8(&cpld_data->bootor));
printf("bootcfg1 = 0x%02x\n", in_8(&cpld_data->bootcfg1));
printf("bootcfg2 = 0x%02x\n", in_8(&cpld_data->bootcfg2));
printf("bootcfg3 = 0x%02x\n", in_8(&cpld_data->bootcfg3));
printf("bootcfg4 = 0x%02x\n", in_8(&cpld_data->bootcfg4));
putc('\n');
}
#endif
int cpld_cmd(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
{
int rc = 0;
unsigned char value;
if (argc <= 1)
return cmd_usage(cmdtp);
if (strcmp(argv[1], "reset") == 0) {
if (!strcmp(argv[2], "altbank") && argv[3]) {
value = (u8)simple_strtoul(argv[3], NULL, 16);
cpld_set_altbank(value);
} else if (!argv[2])
cpld_set_defbank();
else
cmd_usage(cmdtp);
#ifdef DEBUG
} else if (strcmp(argv[1], "dump") == 0) {
cpld_dump_regs();
#endif
} else
rc = cmd_usage(cmdtp);
return rc;
}
U_BOOT_CMD(
cpld_cmd, CONFIG_SYS_MAXARGS, 1, cpld_cmd,
"Reset the board using the CPLD sequencer",
"reset - hard reset to default bank 4\n"
"cpld_cmd reset altbank [bank]- reset to alternate bank\n"
" - [bank] bank value select 1-4\n"
" - bank 1 on the flash 0x0000000~0x0ffffff\n"
" - bank 2 on the flash 0x1000000~0x1ffffff\n"
" - bank 3 on the flash 0x2000000~0x2ffffff\n"
" - bank 4 on the flash 0x3000000~0x3ffffff\n"
#ifdef DEBUG
"cpld_cmd dump - display the CPLD registers\n"
#endif
);
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