io.c
1.32 KB
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/*
* Copyright (c) 2012 The Chromium OS Authors.
*
* SPDX-License-Identifier: GPL-2.0+
*/
/*
* IO space access commands.
*/
#include <common.h>
#include <command.h>
#include <asm/io.h>
/*
* IO Display
*
* Syntax:
* iod{.b, .w, .l} {addr}
*/
int do_io_iod(cmd_tbl_t *cmdtp, int flag, int argc, char *const argv[])
{
ulong addr;
int size;
if (argc != 2)
return CMD_RET_USAGE;
size = cmd_get_data_size(argv[0], 4);
if (size < 0)
return 1;
addr = simple_strtoul(argv[1], NULL, 16);
printf("%04x: ", (u16) addr);
if (size == 4)
printf("%08x\n", inl(addr));
else if (size == 2)
printf("%04x\n", inw(addr));
else
printf("%02x\n", inb(addr));
return 0;
}
int do_io_iow(cmd_tbl_t *cmdtp, int flag, int argc, char *const argv[])
{
ulong addr, val;
int size;
if (argc != 3)
return CMD_RET_USAGE;
size = cmd_get_data_size(argv[0], 4);
if (size < 0)
return 1;
addr = simple_strtoul(argv[1], NULL, 16);
val = simple_strtoul(argv[2], NULL, 16);
if (size == 4)
outl((u32) val, addr);
else if (size == 2)
outw((u16) val, addr);
else
outb((u8) val, addr);
return 0;
}
/**************************************************/
U_BOOT_CMD(iod, 2, 0, do_io_iod,
"IO space display", "[.b, .w, .l] address");
U_BOOT_CMD(iow, 3, 0, do_io_iow,
"IO space modify",
"[.b, .w, .l] address value");