cpld.c
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/*
* Copyright 2014 Freescale Semiconductor
*
* SPDX-License-Identifier: GPL-2.0+
*
* Freescale T2080RDB board-specific CPLD controlling supports.
*/
#include <common.h>
#include <command.h>
#include "cpld.h"
u8 cpld_read(unsigned int reg)
{
void *p = (void *)CONFIG_SYS_CPLD_BASE;
return in_8(p + reg);
}
void cpld_write(unsigned int reg, u8 value)
{
void *p = (void *)CONFIG_SYS_CPLD_BASE;
out_8(p + reg, value);
}
/* Set the boot bank to the alternate bank */
void cpld_set_altbank(void)
{
u8 reg = CPLD_READ(flash_csr);
reg = (reg & ~CPLD_BANK_SEL_MASK) | CPLD_LBMAP_ALTBANK;
CPLD_WRITE(flash_csr, reg);
CPLD_WRITE(reset_ctl, CPLD_LBMAP_RESET);
}
/* Set the boot bank to the default bank */
void cpld_set_defbank(void)
{
u8 reg = CPLD_READ(flash_csr);
reg = (reg & ~CPLD_BANK_SEL_MASK) | CPLD_LBMAP_DFLTBANK;
CPLD_WRITE(flash_csr, reg);
CPLD_WRITE(reset_ctl, CPLD_LBMAP_RESET);
}
int do_cpld(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
{
int rc = 0;
if (argc <= 1)
return cmd_usage(cmdtp);
if (strcmp(argv[1], "reset") == 0) {
if (strcmp(argv[2], "altbank") == 0)
cpld_set_altbank();
else
cpld_set_defbank();
} else {
rc = cmd_usage(cmdtp);
}
return rc;
}
U_BOOT_CMD(
cpld, CONFIG_SYS_MAXARGS, 1, do_cpld,
"Reset the board or alternate bank",
"reset: reset to default bank\n"
"cpld reset altbank: reset to alternate bank\n"
);