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cmd_bmode.c 2.53 KiB
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  • /*
     * Copyright (C) 2012 Boundary Devices Inc.
     *
     * 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
     */
    #include <common.h>
    #include <asm/errno.h>
    #include <asm/io.h>
    #include <asm/imx-common/boot_mode.h>
    #include <malloc.h>
    
    static const struct boot_mode *modes[2];
    
    static const struct boot_mode *search_modes(char *arg)
    {
    	int i;
    
    	for (i = 0; i < ARRAY_SIZE(modes); i++) {
    		const struct boot_mode *p = modes[i];
    		if (p) {
    			while (p->name) {
    				if (!strcmp(p->name, arg))
    					return p;
    				p++;
    			}
    		}
    	}
    	return NULL;
    }
    
    static int create_usage(char *dest)
    {
    	int i;
    	int size = 0;
    
    	for (i = 0; i < ARRAY_SIZE(modes); i++) {
    		const struct boot_mode *p = modes[i];
    		if (p) {
    			while (p->name) {
    				int len = strlen(p->name);
    				if (dest) {
    					memcpy(dest, p->name, len);
    					dest += len;
    					*dest++ = '|';
    				}
    				size += len + 1;
    				p++;
    			}
    		}
    	}
    	if (dest)
    		memcpy(dest - 1, " [noreset]", 11);	/* include trailing 0 */
    	size += 10;
    	return size;
    }
    
    static int do_boot_mode(cmd_tbl_t *cmdtp, int flag, int argc,
    		char * const argv[])
    {
    	const struct boot_mode *p;
    	int reset_requested = 1;
    
    	if (argc < 2)
    		return CMD_RET_USAGE;
    	p = search_modes(argv[1]);
    	if (!p)
    		return CMD_RET_USAGE;
    	if (argc == 3) {
    		if (strcmp(argv[2], "noreset"))
    			return CMD_RET_USAGE;
    		reset_requested = 0;
    	}
    
    	boot_mode_apply(p->cfg_val);
    	if (reset_requested && p->cfg_val)
    		do_reset(NULL, 0, 0, NULL);
    	return 0;
    }
    
    U_BOOT_CMD(
    	bmode, 3, 0, do_boot_mode,
    	NULL,
    	"");
    
    void add_board_boot_modes(const struct boot_mode *p)
    {
    	int size;
    	char *dest;
    
    	if (__u_boot_cmd_bmode.usage) {
    		free(__u_boot_cmd_bmode.usage);
    		__u_boot_cmd_bmode.usage = NULL;
    	}
    
    	modes[0] = p;
    	modes[1] = soc_boot_modes;
    	size = create_usage(NULL);
    	dest = malloc(size);
    	if (dest) {
    		create_usage(dest);
    		__u_boot_cmd_bmode.usage = dest;
    	}
    }