mirror of
https://github.com/brain-hackers/u-boot-brain
synced 2024-08-31 06:18:51 +09:00
1123 lines
25 KiB
C
1123 lines
25 KiB
C
/*
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* (C) Copyright 2000-2008
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* Wolfgang Denk, DENX Software Engineering, wd@denx.de.
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*
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* (C) Copyright 2008
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* Guennadi Liakhovetski, DENX Software Engineering, lg@denx.de.
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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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#include <errno.h>
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#include <fcntl.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <stddef.h>
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#include <string.h>
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#include <sys/types.h>
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#include <sys/ioctl.h>
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#include <sys/stat.h>
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#include <unistd.h>
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#ifdef MTD_OLD
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# include <stdint.h>
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# include <linux/mtd/mtd.h>
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#else
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# define __user /* nothing */
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# include <mtd/mtd-user.h>
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#endif
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#include "fw_env.h"
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#define CMD_GETENV "fw_printenv"
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#define CMD_SETENV "fw_setenv"
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#define min(x, y) ({ \
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typeof(x) _min1 = (x); \
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typeof(y) _min2 = (y); \
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(void) (&_min1 == &_min2); \
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_min1 < _min2 ? _min1 : _min2; })
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struct envdev_s {
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char devname[16]; /* Device name */
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ulong devoff; /* Device offset */
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ulong env_size; /* environment size */
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ulong erase_size; /* device erase size */
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ulong env_sectors; /* number of environment sectors */
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uint8_t mtd_type; /* type of the MTD device */
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};
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static struct envdev_s envdevices[2] =
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{
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{
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.mtd_type = MTD_ABSENT,
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}, {
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.mtd_type = MTD_ABSENT,
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},
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};
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static int dev_current;
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#define DEVNAME(i) envdevices[(i)].devname
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#define DEVOFFSET(i) envdevices[(i)].devoff
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#define ENVSIZE(i) envdevices[(i)].env_size
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#define DEVESIZE(i) envdevices[(i)].erase_size
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#define ENVSECTORS(i) envdevices[(i)].env_sectors
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#define DEVTYPE(i) envdevices[(i)].mtd_type
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#define CONFIG_ENV_SIZE ENVSIZE(dev_current)
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#define ENV_SIZE getenvsize()
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struct env_image_single {
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uint32_t crc; /* CRC32 over data bytes */
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char data[];
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};
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struct env_image_redundant {
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uint32_t crc; /* CRC32 over data bytes */
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unsigned char flags; /* active or obsolete */
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char data[];
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};
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enum flag_scheme {
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FLAG_NONE,
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FLAG_BOOLEAN,
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FLAG_INCREMENTAL,
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};
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struct environment {
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void *image;
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uint32_t *crc;
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unsigned char *flags;
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char *data;
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enum flag_scheme flag_scheme;
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};
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static struct environment environment = {
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.flag_scheme = FLAG_NONE,
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};
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static int HaveRedundEnv = 0;
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static unsigned char active_flag = 1;
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/* obsolete_flag must be 0 to efficiently set it on NOR flash without erasing */
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static unsigned char obsolete_flag = 0;
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#define XMK_STR(x) #x
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#define MK_STR(x) XMK_STR(x)
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static char default_environment[] = {
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#if defined(CONFIG_BOOTARGS)
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"bootargs=" CONFIG_BOOTARGS "\0"
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#endif
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#if defined(CONFIG_BOOTCOMMAND)
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"bootcmd=" CONFIG_BOOTCOMMAND "\0"
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#endif
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#if defined(CONFIG_RAMBOOTCOMMAND)
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"ramboot=" CONFIG_RAMBOOTCOMMAND "\0"
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#endif
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#if defined(CONFIG_NFSBOOTCOMMAND)
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"nfsboot=" CONFIG_NFSBOOTCOMMAND "\0"
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#endif
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#if defined(CONFIG_BOOTDELAY) && (CONFIG_BOOTDELAY >= 0)
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"bootdelay=" MK_STR (CONFIG_BOOTDELAY) "\0"
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#endif
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#if defined(CONFIG_BAUDRATE) && (CONFIG_BAUDRATE >= 0)
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"baudrate=" MK_STR (CONFIG_BAUDRATE) "\0"
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#endif
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#ifdef CONFIG_LOADS_ECHO
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"loads_echo=" MK_STR (CONFIG_LOADS_ECHO) "\0"
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#endif
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#ifdef CONFIG_ETHADDR
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"ethaddr=" MK_STR (CONFIG_ETHADDR) "\0"
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#endif
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#ifdef CONFIG_ETH1ADDR
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"eth1addr=" MK_STR (CONFIG_ETH1ADDR) "\0"
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#endif
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#ifdef CONFIG_ETH2ADDR
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"eth2addr=" MK_STR (CONFIG_ETH2ADDR) "\0"
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#endif
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#ifdef CONFIG_ETH3ADDR
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"eth3addr=" MK_STR (CONFIG_ETH3ADDR) "\0"
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#endif
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#ifdef CONFIG_ETH4ADDR
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"eth4addr=" MK_STR (CONFIG_ETH4ADDR) "\0"
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#endif
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#ifdef CONFIG_ETH5ADDR
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"eth5addr=" MK_STR (CONFIG_ETH5ADDR) "\0"
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#endif
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#ifdef CONFIG_ETHPRIME
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"ethprime=" CONFIG_ETHPRIME "\0"
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#endif
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#ifdef CONFIG_IPADDR
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"ipaddr=" MK_STR (CONFIG_IPADDR) "\0"
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#endif
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#ifdef CONFIG_SERVERIP
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"serverip=" MK_STR (CONFIG_SERVERIP) "\0"
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#endif
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#ifdef CONFIG_SYS_AUTOLOAD
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"autoload=" CONFIG_SYS_AUTOLOAD "\0"
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#endif
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#ifdef CONFIG_ROOTPATH
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"rootpath=" MK_STR (CONFIG_ROOTPATH) "\0"
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#endif
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#ifdef CONFIG_GATEWAYIP
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"gatewayip=" MK_STR (CONFIG_GATEWAYIP) "\0"
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#endif
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#ifdef CONFIG_NETMASK
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"netmask=" MK_STR (CONFIG_NETMASK) "\0"
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#endif
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#ifdef CONFIG_HOSTNAME
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"hostname=" MK_STR (CONFIG_HOSTNAME) "\0"
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#endif
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#ifdef CONFIG_BOOTFILE
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"bootfile=" MK_STR (CONFIG_BOOTFILE) "\0"
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#endif
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#ifdef CONFIG_LOADADDR
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"loadaddr=" MK_STR (CONFIG_LOADADDR) "\0"
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#endif
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#ifdef CONFIG_PREBOOT
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"preboot=" CONFIG_PREBOOT "\0"
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#endif
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#ifdef CONFIG_CLOCKS_IN_MHZ
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"clocks_in_mhz=" "1" "\0"
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#endif
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#if defined(CONFIG_PCI_BOOTDELAY) && (CONFIG_PCI_BOOTDELAY > 0)
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"pcidelay=" MK_STR (CONFIG_PCI_BOOTDELAY) "\0"
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#endif
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#ifdef CONFIG_EXTRA_ENV_SETTINGS
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CONFIG_EXTRA_ENV_SETTINGS
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#endif
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"\0" /* Termimate struct environment data with 2 NULs */
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};
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static int flash_io (int mode);
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static char *envmatch (char * s1, char * s2);
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static int env_init (void);
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static int parse_config (void);
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#if defined(CONFIG_FILE)
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static int get_config (char *);
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#endif
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static inline ulong getenvsize (void)
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{
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ulong rc = CONFIG_ENV_SIZE - sizeof (long);
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if (HaveRedundEnv)
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rc -= sizeof (char);
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return rc;
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}
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/*
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* Search the environment for a variable.
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* Return the value, if found, or NULL, if not found.
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*/
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char *fw_getenv (char *name)
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{
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char *env, *nxt;
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if (env_init ())
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return NULL;
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for (env = environment.data; *env; env = nxt + 1) {
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char *val;
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for (nxt = env; *nxt; ++nxt) {
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if (nxt >= &environment.data[ENV_SIZE]) {
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fprintf (stderr, "## Error: "
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"environment not terminated\n");
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return NULL;
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}
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}
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val = envmatch (name, env);
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if (!val)
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continue;
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return val;
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}
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return NULL;
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}
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/*
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* Print the current definition of one, or more, or all
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* environment variables
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*/
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int fw_printenv (int argc, char *argv[])
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{
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char *env, *nxt;
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int i, n_flag;
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int rc = 0;
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if (env_init ())
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return -1;
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if (argc == 1) { /* Print all env variables */
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for (env = environment.data; *env; env = nxt + 1) {
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for (nxt = env; *nxt; ++nxt) {
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if (nxt >= &environment.data[ENV_SIZE]) {
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fprintf (stderr, "## Error: "
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"environment not terminated\n");
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return -1;
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}
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}
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printf ("%s\n", env);
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}
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return 0;
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}
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if (strcmp (argv[1], "-n") == 0) {
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n_flag = 1;
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++argv;
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--argc;
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if (argc != 2) {
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fprintf (stderr, "## Error: "
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"`-n' option requires exactly one argument\n");
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return -1;
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}
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} else {
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n_flag = 0;
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}
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for (i = 1; i < argc; ++i) { /* print single env variables */
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char *name = argv[i];
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char *val = NULL;
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for (env = environment.data; *env; env = nxt + 1) {
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for (nxt = env; *nxt; ++nxt) {
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if (nxt >= &environment.data[ENV_SIZE]) {
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fprintf (stderr, "## Error: "
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"environment not terminated\n");
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return -1;
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}
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}
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val = envmatch (name, env);
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if (val) {
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if (!n_flag) {
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fputs (name, stdout);
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putc ('=', stdout);
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}
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puts (val);
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break;
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}
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}
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if (!val) {
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fprintf (stderr, "## Error: \"%s\" not defined\n", name);
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rc = -1;
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}
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}
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return rc;
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}
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/*
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* Deletes or sets environment variables. Returns -1 and sets errno error codes:
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* 0 - OK
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* EINVAL - need at least 1 argument
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* EROFS - certain variables ("ethaddr", "serial#") cannot be
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* modified or deleted
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*
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*/
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int fw_setenv (int argc, char *argv[])
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{
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int i, len;
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char *env, *nxt;
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char *oldval = NULL;
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char *name;
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if (argc < 2) {
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errno = EINVAL;
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return -1;
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}
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if (env_init ())
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return -1;
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name = argv[1];
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/*
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* search if variable with this name already exists
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*/
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for (nxt = env = environment.data; *env; env = nxt + 1) {
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for (nxt = env; *nxt; ++nxt) {
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if (nxt >= &environment.data[ENV_SIZE]) {
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fprintf (stderr, "## Error: "
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"environment not terminated\n");
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errno = EINVAL;
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return -1;
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}
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}
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if ((oldval = envmatch (name, env)) != NULL)
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break;
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}
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/*
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* Delete any existing definition
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*/
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if (oldval) {
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/*
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* Ethernet Address and serial# can be set only once
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*/
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if ((strcmp (name, "ethaddr") == 0) ||
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(strcmp (name, "serial#") == 0)) {
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fprintf (stderr, "Can't overwrite \"%s\"\n", name);
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errno = EROFS;
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return -1;
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}
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if (*++nxt == '\0') {
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*env = '\0';
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} else {
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for (;;) {
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*env = *nxt++;
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if ((*env == '\0') && (*nxt == '\0'))
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break;
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++env;
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}
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}
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*++env = '\0';
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}
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/* Delete only ? */
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if (argc < 3)
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goto WRITE_FLASH;
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/*
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* Append new definition at the end
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*/
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for (env = environment.data; *env || *(env + 1); ++env);
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if (env > environment.data)
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++env;
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/*
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* Overflow when:
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* "name" + "=" + "val" +"\0\0" > CONFIG_ENV_SIZE - (env-environment)
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*/
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len = strlen (name) + 2;
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/* add '=' for first arg, ' ' for all others */
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for (i = 2; i < argc; ++i) {
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len += strlen (argv[i]) + 1;
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}
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if (len > (&environment.data[ENV_SIZE] - env)) {
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fprintf (stderr,
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"Error: environment overflow, \"%s\" deleted\n",
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name);
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return -1;
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}
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while ((*env = *name++) != '\0')
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env++;
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for (i = 2; i < argc; ++i) {
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char *val = argv[i];
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*env = (i == 2) ? '=' : ' ';
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while ((*++env = *val++) != '\0');
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}
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/* end is marked with double '\0' */
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*++env = '\0';
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WRITE_FLASH:
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/*
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* Update CRC
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*/
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*environment.crc = crc32 (0, (uint8_t *) environment.data, ENV_SIZE);
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|
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/* write environment back to flash */
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if (flash_io (O_RDWR)) {
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fprintf (stderr, "Error: can't write fw_env to flash\n");
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return -1;
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}
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return 0;
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}
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|
|
|
/*
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* Test for bad block on NAND, just returns 0 on NOR, on NAND:
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* 0 - block is good
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* > 0 - block is bad
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* < 0 - failed to test
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*/
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static int flash_bad_block (int fd, uint8_t mtd_type, loff_t *blockstart)
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{
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if (mtd_type == MTD_NANDFLASH) {
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int badblock = ioctl (fd, MEMGETBADBLOCK, blockstart);
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|
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if (badblock < 0) {
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perror ("Cannot read bad block mark");
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return badblock;
|
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}
|
|
|
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if (badblock) {
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#ifdef DEBUG
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fprintf (stderr, "Bad block at 0x%llx, "
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"skipping\n", *blockstart);
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#endif
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return badblock;
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}
|
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}
|
|
|
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return 0;
|
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}
|
|
|
|
/*
|
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* Read data from flash at an offset into a provided buffer. On NAND it skips
|
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* bad blocks but makes sure it stays within ENVSECTORS (dev) starting from
|
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* the DEVOFFSET (dev) block. On NOR the loop is only run once.
|
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*/
|
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static int flash_read_buf (int dev, int fd, void *buf, size_t count,
|
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off_t offset, uint8_t mtd_type)
|
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{
|
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size_t blocklen; /* erase / write length - one block on NAND,
|
|
0 on NOR */
|
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size_t processed = 0; /* progress counter */
|
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size_t readlen = count; /* current read length */
|
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off_t top_of_range; /* end of the last block we may use */
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|
off_t block_seek; /* offset inside the current block to the start
|
|
of the data */
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|
loff_t blockstart; /* running start of the current block -
|
|
MEMGETBADBLOCK needs 64 bits */
|
|
int rc;
|
|
|
|
/*
|
|
* Start of the first block to be read, relies on the fact, that
|
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* erase sector size is always a power of 2
|
|
*/
|
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blockstart = offset & ~(DEVESIZE (dev) - 1);
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|
|
|
/* Offset inside a block */
|
|
block_seek = offset - blockstart;
|
|
|
|
if (mtd_type == MTD_NANDFLASH) {
|
|
/*
|
|
* NAND: calculate which blocks we are reading. We have
|
|
* to read one block at a time to skip bad blocks.
|
|
*/
|
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blocklen = DEVESIZE (dev);
|
|
|
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/*
|
|
* To calculate the top of the range, we have to use the
|
|
* global DEVOFFSET (dev), which can be different from offset
|
|
*/
|
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top_of_range = (DEVOFFSET (dev) & ~(blocklen - 1)) +
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ENVSECTORS (dev) * blocklen;
|
|
|
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/* Limit to one block for the first read */
|
|
if (readlen > blocklen - block_seek)
|
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readlen = blocklen - block_seek;
|
|
} else {
|
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blocklen = 0;
|
|
top_of_range = offset + count;
|
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}
|
|
|
|
/* This only runs once on NOR flash */
|
|
while (processed < count) {
|
|
rc = flash_bad_block (fd, mtd_type, &blockstart);
|
|
if (rc < 0) /* block test failed */
|
|
return -1;
|
|
|
|
if (blockstart + block_seek + readlen > top_of_range) {
|
|
/* End of range is reached */
|
|
fprintf (stderr,
|
|
"Too few good blocks within range\n");
|
|
return -1;
|
|
}
|
|
|
|
if (rc) { /* block is bad */
|
|
blockstart += blocklen;
|
|
continue;
|
|
}
|
|
|
|
/*
|
|
* If a block is bad, we retry in the next block at the same
|
|
* offset - see common/env_nand.c::writeenv()
|
|
*/
|
|
lseek (fd, blockstart + block_seek, SEEK_SET);
|
|
|
|
rc = read (fd, buf + processed, readlen);
|
|
if (rc != readlen) {
|
|
fprintf (stderr, "Read error on %s: %s\n",
|
|
DEVNAME (dev), strerror (errno));
|
|
return -1;
|
|
}
|
|
#ifdef DEBUG
|
|
fprintf (stderr, "Read 0x%x bytes at 0x%llx\n",
|
|
rc, blockstart + block_seek);
|
|
#endif
|
|
processed += readlen;
|
|
readlen = min (blocklen, count - processed);
|
|
block_seek = 0;
|
|
blockstart += blocklen;
|
|
}
|
|
|
|
return processed;
|
|
}
|
|
|
|
/*
|
|
* Write count bytes at offset, but stay within ENVSETCORS (dev) sectors of
|
|
* DEVOFFSET (dev). Similar to the read case above, on NOR we erase and write
|
|
* the whole data at once.
|
|
*/
|
|
static int flash_write_buf (int dev, int fd, void *buf, size_t count,
|
|
off_t offset, uint8_t mtd_type)
|
|
{
|
|
void *data;
|
|
struct erase_info_user erase;
|
|
size_t blocklen; /* length of NAND block / NOR erase sector */
|
|
size_t erase_len; /* whole area that can be erased - may include
|
|
bad blocks */
|
|
size_t erasesize; /* erase / write length - one block on NAND,
|
|
whole area on NOR */
|
|
size_t processed = 0; /* progress counter */
|
|
size_t write_total; /* total size to actually write - excludinig
|
|
bad blocks */
|
|
off_t erase_offset; /* offset to the first erase block (aligned)
|
|
below offset */
|
|
off_t block_seek; /* offset inside the erase block to the start
|
|
of the data */
|
|
off_t top_of_range; /* end of the last block we may use */
|
|
loff_t blockstart; /* running start of the current block -
|
|
MEMGETBADBLOCK needs 64 bits */
|
|
int rc;
|
|
|
|
blocklen = DEVESIZE (dev);
|
|
|
|
/* Erase sector size is always a power of 2 */
|
|
top_of_range = (DEVOFFSET (dev) & ~(blocklen - 1)) +
|
|
ENVSECTORS (dev) * blocklen;
|
|
|
|
erase_offset = offset & ~(blocklen - 1);
|
|
|
|
/* Maximum area we may use */
|
|
erase_len = top_of_range - erase_offset;
|
|
|
|
blockstart = erase_offset;
|
|
/* Offset inside a block */
|
|
block_seek = offset - erase_offset;
|
|
|
|
/*
|
|
* Data size we actually have to write: from the start of the block
|
|
* to the start of the data, then count bytes of data, and to the
|
|
* end of the block
|
|
*/
|
|
write_total = (block_seek + count + blocklen - 1) & ~(blocklen - 1);
|
|
|
|
/*
|
|
* Support data anywhere within erase sectors: read out the complete
|
|
* area to be erased, replace the environment image, write the whole
|
|
* block back again.
|
|
*/
|
|
if (write_total > count) {
|
|
data = malloc (erase_len);
|
|
if (!data) {
|
|
fprintf (stderr,
|
|
"Cannot malloc %u bytes: %s\n",
|
|
erase_len, strerror (errno));
|
|
return -1;
|
|
}
|
|
|
|
rc = flash_read_buf (dev, fd, data, write_total, erase_offset,
|
|
mtd_type);
|
|
if (write_total != rc)
|
|
return -1;
|
|
|
|
/* Overwrite the old environment */
|
|
memcpy (data + block_seek, buf, count);
|
|
} else {
|
|
/*
|
|
* We get here, iff offset is block-aligned and count is a
|
|
* multiple of blocklen - see write_total calculation above
|
|
*/
|
|
data = buf;
|
|
}
|
|
|
|
if (mtd_type == MTD_NANDFLASH) {
|
|
/*
|
|
* NAND: calculate which blocks we are writing. We have
|
|
* to write one block at a time to skip bad blocks.
|
|
*/
|
|
erasesize = blocklen;
|
|
} else {
|
|
erasesize = erase_len;
|
|
}
|
|
|
|
erase.length = erasesize;
|
|
|
|
/* This only runs once on NOR flash */
|
|
while (processed < write_total) {
|
|
rc = flash_bad_block (fd, mtd_type, &blockstart);
|
|
if (rc < 0) /* block test failed */
|
|
return rc;
|
|
|
|
if (blockstart + erasesize > top_of_range) {
|
|
fprintf (stderr, "End of range reached, aborting\n");
|
|
return -1;
|
|
}
|
|
|
|
if (rc) { /* block is bad */
|
|
blockstart += blocklen;
|
|
continue;
|
|
}
|
|
|
|
erase.start = blockstart;
|
|
ioctl (fd, MEMUNLOCK, &erase);
|
|
|
|
if (ioctl (fd, MEMERASE, &erase) != 0) {
|
|
fprintf (stderr, "MTD erase error on %s: %s\n",
|
|
DEVNAME (dev),
|
|
strerror (errno));
|
|
return -1;
|
|
}
|
|
|
|
if (lseek (fd, blockstart, SEEK_SET) == -1) {
|
|
fprintf (stderr,
|
|
"Seek error on %s: %s\n",
|
|
DEVNAME (dev), strerror (errno));
|
|
return -1;
|
|
}
|
|
|
|
#ifdef DEBUG
|
|
printf ("Write 0x%x bytes at 0x%llx\n", erasesize, blockstart);
|
|
#endif
|
|
if (write (fd, data + processed, erasesize) != erasesize) {
|
|
fprintf (stderr, "Write error on %s: %s\n",
|
|
DEVNAME (dev), strerror (errno));
|
|
return -1;
|
|
}
|
|
|
|
ioctl (fd, MEMLOCK, &erase);
|
|
|
|
processed += blocklen;
|
|
block_seek = 0;
|
|
blockstart += blocklen;
|
|
}
|
|
|
|
if (write_total > count)
|
|
free (data);
|
|
|
|
return processed;
|
|
}
|
|
|
|
/*
|
|
* Set obsolete flag at offset - NOR flash only
|
|
*/
|
|
static int flash_flag_obsolete (int dev, int fd, off_t offset)
|
|
{
|
|
int rc;
|
|
|
|
/* This relies on the fact, that obsolete_flag == 0 */
|
|
rc = lseek (fd, offset, SEEK_SET);
|
|
if (rc < 0) {
|
|
fprintf (stderr, "Cannot seek to set the flag on %s \n",
|
|
DEVNAME (dev));
|
|
return rc;
|
|
}
|
|
rc = write (fd, &obsolete_flag, sizeof (obsolete_flag));
|
|
if (rc < 0)
|
|
perror ("Could not set obsolete flag");
|
|
|
|
return rc;
|
|
}
|
|
|
|
static int flash_write (int fd_current, int fd_target, int dev_target)
|
|
{
|
|
int rc;
|
|
|
|
switch (environment.flag_scheme) {
|
|
case FLAG_NONE:
|
|
break;
|
|
case FLAG_INCREMENTAL:
|
|
(*environment.flags)++;
|
|
break;
|
|
case FLAG_BOOLEAN:
|
|
*environment.flags = active_flag;
|
|
break;
|
|
default:
|
|
fprintf (stderr, "Unimplemented flash scheme %u \n",
|
|
environment.flag_scheme);
|
|
return -1;
|
|
}
|
|
|
|
#ifdef DEBUG
|
|
printf ("Writing new environment at 0x%lx on %s\n",
|
|
DEVOFFSET (dev_target), DEVNAME (dev_target));
|
|
#endif
|
|
rc = flash_write_buf (dev_target, fd_target, environment.image,
|
|
CONFIG_ENV_SIZE, DEVOFFSET (dev_target),
|
|
DEVTYPE(dev_target));
|
|
if (rc < 0)
|
|
return rc;
|
|
|
|
if (environment.flag_scheme == FLAG_BOOLEAN) {
|
|
/* Have to set obsolete flag */
|
|
off_t offset = DEVOFFSET (dev_current) +
|
|
offsetof (struct env_image_redundant, flags);
|
|
#ifdef DEBUG
|
|
printf ("Setting obsolete flag in environment at 0x%lx on %s\n",
|
|
DEVOFFSET (dev_current), DEVNAME (dev_current));
|
|
#endif
|
|
flash_flag_obsolete (dev_current, fd_current, offset);
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int flash_read (int fd)
|
|
{
|
|
struct mtd_info_user mtdinfo;
|
|
int rc;
|
|
|
|
rc = ioctl (fd, MEMGETINFO, &mtdinfo);
|
|
if (rc < 0) {
|
|
perror ("Cannot get MTD information");
|
|
return -1;
|
|
}
|
|
|
|
if (mtdinfo.type != MTD_NORFLASH && mtdinfo.type != MTD_NANDFLASH) {
|
|
fprintf (stderr, "Unsupported flash type %u\n", mtdinfo.type);
|
|
return -1;
|
|
}
|
|
|
|
DEVTYPE(dev_current) = mtdinfo.type;
|
|
|
|
rc = flash_read_buf (dev_current, fd, environment.image, CONFIG_ENV_SIZE,
|
|
DEVOFFSET (dev_current), mtdinfo.type);
|
|
|
|
return (rc != CONFIG_ENV_SIZE) ? -1 : 0;
|
|
}
|
|
|
|
static int flash_io (int mode)
|
|
{
|
|
int fd_current, fd_target, rc, dev_target;
|
|
|
|
/* dev_current: fd_current, erase_current */
|
|
fd_current = open (DEVNAME (dev_current), mode);
|
|
if (fd_current < 0) {
|
|
fprintf (stderr,
|
|
"Can't open %s: %s\n",
|
|
DEVNAME (dev_current), strerror (errno));
|
|
return -1;
|
|
}
|
|
|
|
if (mode == O_RDWR) {
|
|
if (HaveRedundEnv) {
|
|
/* switch to next partition for writing */
|
|
dev_target = !dev_current;
|
|
/* dev_target: fd_target, erase_target */
|
|
fd_target = open (DEVNAME (dev_target), mode);
|
|
if (fd_target < 0) {
|
|
fprintf (stderr,
|
|
"Can't open %s: %s\n",
|
|
DEVNAME (dev_target),
|
|
strerror (errno));
|
|
rc = -1;
|
|
goto exit;
|
|
}
|
|
} else {
|
|
dev_target = dev_current;
|
|
fd_target = fd_current;
|
|
}
|
|
|
|
rc = flash_write (fd_current, fd_target, dev_target);
|
|
|
|
if (HaveRedundEnv) {
|
|
if (close (fd_target)) {
|
|
fprintf (stderr,
|
|
"I/O error on %s: %s\n",
|
|
DEVNAME (dev_target),
|
|
strerror (errno));
|
|
rc = -1;
|
|
}
|
|
}
|
|
} else {
|
|
rc = flash_read (fd_current);
|
|
}
|
|
|
|
exit:
|
|
if (close (fd_current)) {
|
|
fprintf (stderr,
|
|
"I/O error on %s: %s\n",
|
|
DEVNAME (dev_current), strerror (errno));
|
|
return -1;
|
|
}
|
|
|
|
return rc;
|
|
}
|
|
|
|
/*
|
|
* s1 is either a simple 'name', or a 'name=value' pair.
|
|
* s2 is a 'name=value' pair.
|
|
* If the names match, return the value of s2, else NULL.
|
|
*/
|
|
|
|
static char *envmatch (char * s1, char * s2)
|
|
{
|
|
|
|
while (*s1 == *s2++)
|
|
if (*s1++ == '=')
|
|
return s2;
|
|
if (*s1 == '\0' && *(s2 - 1) == '=')
|
|
return s2;
|
|
return NULL;
|
|
}
|
|
|
|
/*
|
|
* Prevent confusion if running from erased flash memory
|
|
*/
|
|
static int env_init (void)
|
|
{
|
|
int crc0, crc0_ok;
|
|
char flag0;
|
|
void *addr0;
|
|
|
|
int crc1, crc1_ok;
|
|
char flag1;
|
|
void *addr1;
|
|
|
|
struct env_image_single *single;
|
|
struct env_image_redundant *redundant;
|
|
|
|
if (parse_config ()) /* should fill envdevices */
|
|
return -1;
|
|
|
|
addr0 = calloc (1, CONFIG_ENV_SIZE);
|
|
if (addr0 == NULL) {
|
|
fprintf (stderr,
|
|
"Not enough memory for environment (%ld bytes)\n",
|
|
CONFIG_ENV_SIZE);
|
|
return -1;
|
|
}
|
|
|
|
/* read environment from FLASH to local buffer */
|
|
environment.image = addr0;
|
|
|
|
if (HaveRedundEnv) {
|
|
redundant = addr0;
|
|
environment.crc = &redundant->crc;
|
|
environment.flags = &redundant->flags;
|
|
environment.data = redundant->data;
|
|
} else {
|
|
single = addr0;
|
|
environment.crc = &single->crc;
|
|
environment.flags = NULL;
|
|
environment.data = single->data;
|
|
}
|
|
|
|
dev_current = 0;
|
|
if (flash_io (O_RDONLY))
|
|
return -1;
|
|
|
|
crc0 = crc32 (0, (uint8_t *) environment.data, ENV_SIZE);
|
|
crc0_ok = (crc0 == *environment.crc);
|
|
if (!HaveRedundEnv) {
|
|
if (!crc0_ok) {
|
|
fprintf (stderr,
|
|
"Warning: Bad CRC, using default environment\n");
|
|
memcpy(environment.data, default_environment, sizeof default_environment);
|
|
}
|
|
} else {
|
|
flag0 = *environment.flags;
|
|
|
|
dev_current = 1;
|
|
addr1 = calloc (1, CONFIG_ENV_SIZE);
|
|
if (addr1 == NULL) {
|
|
fprintf (stderr,
|
|
"Not enough memory for environment (%ld bytes)\n",
|
|
CONFIG_ENV_SIZE);
|
|
return -1;
|
|
}
|
|
redundant = addr1;
|
|
|
|
/*
|
|
* have to set environment.image for flash_read(), careful -
|
|
* other pointers in environment still point inside addr0
|
|
*/
|
|
environment.image = addr1;
|
|
if (flash_io (O_RDONLY))
|
|
return -1;
|
|
|
|
/* Check flag scheme compatibility */
|
|
if (DEVTYPE(dev_current) == MTD_NORFLASH &&
|
|
DEVTYPE(!dev_current) == MTD_NORFLASH) {
|
|
environment.flag_scheme = FLAG_BOOLEAN;
|
|
} else if (DEVTYPE(dev_current) == MTD_NANDFLASH &&
|
|
DEVTYPE(!dev_current) == MTD_NANDFLASH) {
|
|
environment.flag_scheme = FLAG_INCREMENTAL;
|
|
} else {
|
|
fprintf (stderr, "Incompatible flash types!\n");
|
|
return -1;
|
|
}
|
|
|
|
crc1 = crc32 (0, (uint8_t *) redundant->data, ENV_SIZE);
|
|
crc1_ok = (crc1 == redundant->crc);
|
|
flag1 = redundant->flags;
|
|
|
|
if (crc0_ok && !crc1_ok) {
|
|
dev_current = 0;
|
|
} else if (!crc0_ok && crc1_ok) {
|
|
dev_current = 1;
|
|
} else if (!crc0_ok && !crc1_ok) {
|
|
fprintf (stderr,
|
|
"Warning: Bad CRC, using default environment\n");
|
|
memcpy (environment.data, default_environment,
|
|
sizeof default_environment);
|
|
dev_current = 0;
|
|
} else {
|
|
switch (environment.flag_scheme) {
|
|
case FLAG_BOOLEAN:
|
|
if (flag0 == active_flag &&
|
|
flag1 == obsolete_flag) {
|
|
dev_current = 0;
|
|
} else if (flag0 == obsolete_flag &&
|
|
flag1 == active_flag) {
|
|
dev_current = 1;
|
|
} else if (flag0 == flag1) {
|
|
dev_current = 0;
|
|
} else if (flag0 == 0xFF) {
|
|
dev_current = 0;
|
|
} else if (flag1 == 0xFF) {
|
|
dev_current = 1;
|
|
} else {
|
|
dev_current = 0;
|
|
}
|
|
break;
|
|
case FLAG_INCREMENTAL:
|
|
if ((flag0 == 255 && flag1 == 0) ||
|
|
flag1 > flag0)
|
|
dev_current = 1;
|
|
else if ((flag1 == 255 && flag0 == 0) ||
|
|
flag0 > flag1)
|
|
dev_current = 0;
|
|
else /* flags are equal - almost impossible */
|
|
dev_current = 0;
|
|
break;
|
|
default:
|
|
fprintf (stderr, "Unknown flag scheme %u \n",
|
|
environment.flag_scheme);
|
|
return -1;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* If we are reading, we don't need the flag and the CRC any
|
|
* more, if we are writing, we will re-calculate CRC and update
|
|
* flags before writing out
|
|
*/
|
|
if (dev_current) {
|
|
environment.image = addr1;
|
|
environment.crc = &redundant->crc;
|
|
environment.flags = &redundant->flags;
|
|
environment.data = redundant->data;
|
|
free (addr0);
|
|
} else {
|
|
environment.image = addr0;
|
|
/* Other pointers are already set */
|
|
free (addr1);
|
|
}
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
|
|
static int parse_config ()
|
|
{
|
|
struct stat st;
|
|
|
|
#if defined(CONFIG_FILE)
|
|
/* Fills in DEVNAME(), ENVSIZE(), DEVESIZE(). Or don't. */
|
|
if (get_config (CONFIG_FILE)) {
|
|
fprintf (stderr,
|
|
"Cannot parse config file: %s\n", strerror (errno));
|
|
return -1;
|
|
}
|
|
#else
|
|
strcpy (DEVNAME (0), DEVICE1_NAME);
|
|
DEVOFFSET (0) = DEVICE1_OFFSET;
|
|
ENVSIZE (0) = ENV1_SIZE;
|
|
DEVESIZE (0) = DEVICE1_ESIZE;
|
|
ENVSECTORS (0) = DEVICE1_ENVSECTORS;
|
|
#ifdef HAVE_REDUND
|
|
strcpy (DEVNAME (1), DEVICE2_NAME);
|
|
DEVOFFSET (1) = DEVICE2_OFFSET;
|
|
ENVSIZE (1) = ENV2_SIZE;
|
|
DEVESIZE (1) = DEVICE2_ESIZE;
|
|
ENVSECTORS (1) = DEVICE2_ENVSECTORS;
|
|
HaveRedundEnv = 1;
|
|
#endif
|
|
#endif
|
|
if (stat (DEVNAME (0), &st)) {
|
|
fprintf (stderr,
|
|
"Cannot access MTD device %s: %s\n",
|
|
DEVNAME (0), strerror (errno));
|
|
return -1;
|
|
}
|
|
|
|
if (HaveRedundEnv && stat (DEVNAME (1), &st)) {
|
|
fprintf (stderr,
|
|
"Cannot access MTD device %s: %s\n",
|
|
DEVNAME (1), strerror (errno));
|
|
return -1;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
#if defined(CONFIG_FILE)
|
|
static int get_config (char *fname)
|
|
{
|
|
FILE *fp;
|
|
int i = 0;
|
|
int rc;
|
|
char dump[128];
|
|
|
|
fp = fopen (fname, "r");
|
|
if (fp == NULL)
|
|
return -1;
|
|
|
|
while (i < 2 && fgets (dump, sizeof (dump), fp)) {
|
|
/* Skip incomplete conversions and comment strings */
|
|
if (dump[0] == '#')
|
|
continue;
|
|
|
|
rc = sscanf (dump, "%s %lx %lx %lx %lx",
|
|
DEVNAME (i),
|
|
&DEVOFFSET (i),
|
|
&ENVSIZE (i),
|
|
&DEVESIZE (i),
|
|
&ENVSECTORS (i));
|
|
|
|
if (rc < 4)
|
|
continue;
|
|
|
|
if (rc < 5)
|
|
/* Default - 1 sector */
|
|
ENVSECTORS (i) = 1;
|
|
|
|
i++;
|
|
}
|
|
fclose (fp);
|
|
|
|
HaveRedundEnv = i - 1;
|
|
if (!i) { /* No valid entries found */
|
|
errno = EINVAL;
|
|
return -1;
|
|
} else
|
|
return 0;
|
|
}
|
|
#endif
|