205 lines
4.7 KiB
C
205 lines
4.7 KiB
C
/*
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* erase, protect, unprotect - FLASH support
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*
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* (C) Copyright 2000
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* Wolfgang Denk, DENX Software Engineering, wd@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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*/
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/**
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* @file
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* @brief Flash memory support: erase, protect, unprotect
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*/
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#include <common.h>
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#include <command.h>
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#include <errno.h>
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#include <getopt.h>
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#include <fs.h>
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#include <fcntl.h>
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#include <linux/stat.h>
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static int do_flerase(int argc, char *argv[])
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{
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int fd;
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char *filename = NULL;
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struct stat s;
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loff_t start = 0, size = ~0;
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int ret = 0;
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if (argc == 1)
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return COMMAND_ERROR_USAGE;
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filename = argv[1];
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if (stat(filename, &s)) {
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printf("stat %s: %s\n", filename, errno_str());
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return 1;
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}
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size = s.st_size;
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fd = open(filename, O_WRONLY);
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if (fd < 0) {
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printf("open %s: %s\n", filename, errno_str());
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return 1;
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}
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if (argc == 3 && parse_area_spec(argv[2], &start, &size)) {
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printf("could not parse: %s\n", argv[optind]);
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ret = 1;
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goto out;
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}
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if (erase(fd, size, start)) {
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perror("erase");
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ret = 1;
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}
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out:
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close(fd);
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return ret;
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}
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BAREBOX_CMD_HELP_START(erase)
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BAREBOX_CMD_HELP_USAGE("erase <device> [area]\n")
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BAREBOX_CMD_HELP_SHORT("Erase a flash device or parts of a device if an area specification is given.\n")
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BAREBOX_CMD_HELP_END
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BAREBOX_CMD_START(erase)
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.cmd = do_flerase,
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.usage = "erase FLASH memory",
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BAREBOX_CMD_HELP(cmd_erase_help)
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BAREBOX_CMD_END
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/**
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* @page erase_command
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<p> Erase the flash memory handled by this device. Which area will be
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erased depends on the device: If the device represents the whole flash
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memory, the whole memory will be erased. If the device represents a
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partition on a main flash memory, only this partition part will be
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erased. </p>
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Refer to \ref addpart_command, \ref delpart_command and \ref
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devinfo_command for partition handling.
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*/
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static int do_protect(int argc, char *argv[])
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{
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int fd;
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char *filename = NULL;
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struct stat s;
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int prot = 1;
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loff_t start = 0, size = ~0;
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int ret = 0, err;
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if (argc == 1)
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return COMMAND_ERROR_USAGE;
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filename = argv[1];
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if (*argv[0] == 'u')
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prot = 0;
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if (stat(filename, &s)) {
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printf("stat %s: %s\n", filename, errno_str());
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return 1;
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}
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size = s.st_size;
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fd = open(filename, O_WRONLY);
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if (fd < 0) {
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printf("open %s: %s\n", filename, errno_str());
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return 1;
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}
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if (argc == 3)
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if (parse_area_spec(argv[2], &start, &size)) {
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printf("could not parse: %s\n", argv[optind]);
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ret = 1;
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goto out;
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}
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err = protect(fd, size, start, prot);
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if (err && err != -ENOSYS) {
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perror("protect");
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ret = 1;
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goto out;
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}
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out:
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close(fd);
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return ret;
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}
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BAREBOX_CMD_HELP_START(protect)
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BAREBOX_CMD_HELP_USAGE("protect <device> [area]\n")
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BAREBOX_CMD_HELP_SHORT("protect a flash device (or parts of a device, if an area is specified)\n")
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BAREBOX_CMD_HELP_END
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BAREBOX_CMD_START(protect)
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.cmd = do_protect,
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.usage = "enable flash write protection",
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BAREBOX_CMD_HELP(cmd_protect_help)
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BAREBOX_CMD_END
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/**
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* @page protect_command
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Protect the flash memory behind the device. It depends on the device
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given, what area will be protected. If the device represents the whole
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flash memory the whole memory will be protected. If the device
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represents a partition on a main flash memory, only this partition part
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will be protected.
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Refer addpart_command, delpart_command and devinfo_command for partition
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handling.
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\todo Rework this documentation, what is an 'area'? Explain more about
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flashes here.
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*/
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BAREBOX_CMD_HELP_START(unprotect)
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BAREBOX_CMD_HELP_USAGE("unprotect <device> [area]\n")
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BAREBOX_CMD_HELP_SHORT("unprotect a flash device (or parts of a device, if an area is specified)\n")
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BAREBOX_CMD_HELP_END
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BAREBOX_CMD_START(unprotect)
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.cmd = do_protect,
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.usage = "disable flash write protection",
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BAREBOX_CMD_HELP(cmd_unprotect_help)
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BAREBOX_CMD_END
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/**
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* @page unprotect_command
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Unprotect the flash memory behind the device. It depends on the device given,
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what area will be unprotected. If the device represents the whole flash memory
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the whole memory will be unprotected. If the device represents a partition
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on a main flash memory, only this partition part will be unprotected.
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Refer addpart_command, delpart_command and devinfo_command for partition
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handling.
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\todo Rework this documentation, what does it mean?
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*/
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