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  • /*
     * Copyright (c) 2012 The Chromium OS Authors.
     *
     * See file CREDITS for list of people who contributed to this
     * project.
     *
     * This program is free software; you can redistribute it and/or
     * modify it under the terms of the GNU General Public License as
     * published by the Free Software Foundation; either version 2 of
     * the License, or (at your option) any later version.
     *
     * This program is distributed in the hope that it will be useful,
     * but WITHOUT ANY WARRANTY; without even the implied warranty of
     * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
     * GNU General Public License for more details.
     *
     * You should have received a copy of the GNU General Public License
     * along with this program; if not, write to the Free Software
     * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
     * MA 02111-1307 USA
     */
    
    /*
     * 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, size, val;
    
    	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 [# of objects]");
    
    U_BOOT_CMD(iow, 3, 0, do_io_iow,
    	   "IO space modify (auto-incrementing address)",
    	   "[.b, .w, .l] address");