mirror of
https://source.denx.de/u-boot/u-boot.git
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9ad557be2f
Provide u-boot console functions to access IO space registers. A no
thrills implementation, accessing one register at a time.
For example:
boot > iod 80
0080: 00000094
boot > iod.w 80
0080: 0094
boot > iod.b 80
0080: 94
boot > iow.b 0x80 12
boot > iod 0x80
0080: 00000012
Signed-off-by: Vadim Bendebury <vbendeb@chromium.org>
Signed-off-by: Simon Glass <sjg@chromium.org>
94 lines
2.1 KiB
C
94 lines
2.1 KiB
C
/*
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* Copyright (c) 2012 The Chromium OS Authors.
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*
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* See file CREDITS for list of people who contributed to this
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* project.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation; either version 2 of
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* the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
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* MA 02111-1307 USA
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*/
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/*
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* IO space access commands.
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*/
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#include <common.h>
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#include <command.h>
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#include <asm/io.h>
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/*
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* IO Display
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*
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* Syntax:
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* iod{.b, .w, .l} {addr}
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*/
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int do_io_iod(cmd_tbl_t *cmdtp, int flag, int argc, char *const argv[])
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{
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ulong addr;
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int size;
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if (argc != 2)
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return CMD_RET_USAGE;
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size = cmd_get_data_size(argv[0], 4);
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if (size < 0)
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return 1;
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addr = simple_strtoul(argv[1], NULL, 16);
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printf("%04x: ", (u16) addr);
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if (size == 4)
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printf("%08x\n", inl(addr));
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else if (size == 2)
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printf("%04x\n", inw(addr));
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else
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printf("%02x\n", inb(addr));
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return 0;
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}
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int do_io_iow(cmd_tbl_t *cmdtp, int flag, int argc, char *const argv[])
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{
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ulong addr, size, val;
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if (argc != 3)
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return CMD_RET_USAGE;
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size = cmd_get_data_size(argv[0], 4);
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if (size < 0)
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return 1;
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addr = simple_strtoul(argv[1], NULL, 16);
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val = simple_strtoul(argv[2], NULL, 16);
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if (size == 4)
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outl((u32) val, addr);
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else if (size == 2)
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outw((u16) val, addr);
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else
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outb((u8) val, addr);
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return 0;
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}
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/**************************************************/
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U_BOOT_CMD(iod, 2, 0, do_io_iod,
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"IO space display", "[.b, .w, .l] address [# of objects]");
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U_BOOT_CMD(iow, 3, 0, do_io_iow,
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"IO space modify (auto-incrementing address)",
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"[.b, .w, .l] address");
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