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/**
* Copyright 2014 Freescale Semiconductor
*
* 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"
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_ctl_status);
reg = (reg & ~CPLD_BANK_SEL_MASK) | CPLD_LBMAP_ALTBANK;
CPLD_WRITE(flash_ctl_status, reg);
CPLD_WRITE(reset_ctl1, CPLD_LBMAP_RESET);
}
/**
* Set the boot bank to the default bank
*/
void cpld_set_defbank(void)
{
u8 reg = CPLD_READ(flash_ctl_status);
reg = (reg & ~CPLD_BANK_SEL_MASK) | CPLD_LBMAP_DFLTBANK;
CPLD_WRITE(flash_ctl_status, reg);
CPLD_WRITE(reset_ctl1, CPLD_LBMAP_RESET);
}
#ifdef DEBUG
static void cpld_dump_regs(void)
{
printf("cpld_ver = 0x%02x\n", CPLD_READ(cpld_ver));
printf("cpld_ver_sub = 0x%02x\n", CPLD_READ(cpld_ver_sub));
printf("hw_ver = 0x%02x\n", CPLD_READ(hw_ver));
printf("sw_ver = 0x%02x\n", CPLD_READ(sw_ver));
printf("reset_ctl1 = 0x%02x\n", CPLD_READ(reset_ctl1));
printf("reset_ctl2 = 0x%02x\n", CPLD_READ(reset_ctl2));
printf("int_status = 0x%02x\n", CPLD_READ(int_status));
printf("flash_ctl_status = 0x%02x\n", CPLD_READ(flash_ctl_status));
printf("fan_ctl_status = 0x%02x\n", CPLD_READ(fan_ctl_status));
printf("led_ctl_status = 0x%02x\n", CPLD_READ(led_ctl_status));
printf("sfp_ctl_status = 0x%02x\n", CPLD_READ(sfp_ctl_status));
printf("misc_ctl_status = 0x%02x\n", CPLD_READ(misc_ctl_status));
printf("boot_override = 0x%02x\n", CPLD_READ(boot_override));
printf("boot_config1 = 0x%02x\n", CPLD_READ(boot_config1));
printf("boot_config2 = 0x%02x\n", CPLD_READ(boot_config2));
putc('\n');
}
#endif
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();
#ifdef DEBUG
} else if (strcmp(argv[1], "dump") == 0) {
cpld_dump_regs();
#endif
} else
rc = cmd_usage(cmdtp);
return rc;
}
U_BOOT_CMD(
cpld, CONFIG_SYS_MAXARGS, 1, do_cpld,
"Reset the board or alternate bank",
"reset - hard reset to default bank\n"
"cpld reset altbank - reset to alternate bank\n"
#ifdef DEBUG
"cpld dump - display the CPLD registers\n"
#endif
);
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