215 lines
5.8 KiB
C
215 lines
5.8 KiB
C
/*
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* partition.c - parse a linux-like mtd partition definition and register
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* the new partitions
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*
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* Copyright (c) 2007 Sascha Hauer <s.hauer@pengutronix.de>, Pengutronix
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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 modify
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* it under the terms of the GNU General Public License version 2
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* as published by the Free Software Foundation.
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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, MA 02111-1307 USA
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*/
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#include <common.h>
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#include <command.h>
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#include <driver.h>
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#include <malloc.h>
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#include <partition.h>
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#include <errno.h>
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#include <xfuncs.h>
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static void dev_del_partitions(struct device_d *physdev)
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{
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struct device_d *dev;
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char buf[MAX_DRIVER_NAME];
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int i = 0;
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/* This is lame. Devices should to able to have children */
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while (1) {
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sprintf(buf, "%s.%d", physdev->id, i);
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dev = device_from_spec_str(buf, NULL);
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if (dev) {
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struct partition *part = dev->type_data;
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unregister_device(dev);
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free(part);
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}
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else
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break;
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i++;
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}
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}
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static int mtd_part_do_parse_one (struct partition *part, const char *str, char **endp)
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{
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ulong size;
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char *end;
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char buf[MAX_DRIVER_NAME];
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memset(buf, 0, MAX_DRIVER_NAME);
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if (*str == '-') {
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size = part->physdev->size - part->offset;
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end = (char *)str + 1;
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} else {
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size = strtoul_suffix(str, &end, 0);
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}
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if (size + part->offset > part->physdev->size) {
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printf("partition end is beyond device\n");
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return -EINVAL;
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}
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str = end;
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if (*str == '(') {
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str++;
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end = strchr(str, ')');
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if (!end) {
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printf("could not find matching ')'\n");
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return -EINVAL;
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}
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if (end - str >= MAX_DRIVER_NAME) {
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printf("device name too long\n");
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return -EINVAL;
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}
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memcpy(part->name, str, end - str);
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end++;
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}
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str = end;
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if (*str == 'r' && *(str + 1) == 'o') {
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part->readonly = 1;
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end = (char *)(str + 2);
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}
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if (endp)
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*endp = end;
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strcpy(part->device.name, "partition");
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part->device.size = size;
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return 0;
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}
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int do_addpart ( cmd_tbl_t *cmdtp, int flag, int argc, char *argv[])
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{
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struct partition *part;
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struct device_d *dev;
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char *endp;
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int num = 0;
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unsigned long offset;
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if (argc != 2) {
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printf ("Usage:\n%s\n", cmdtp->usage);
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return 1;
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}
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dev = device_from_spec_str(argv[1], &endp);
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if (!dev) {
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printf("no such device: %s\n",argv[1]);
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return 1;
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}
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dev_del_partitions(dev);
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offset = 0;
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while (1) {
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part = xzalloc(sizeof(struct partition));
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part->offset = offset;
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part->physdev = dev;
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part->num = num;
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part->device.map_base = dev->map_base + offset;
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if(mtd_part_do_parse_one(part, endp, &endp)) {
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dev_del_partitions(dev);
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free(part);
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return 1;
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}
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offset += part->device.size;
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part->device.type_data = part;
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sprintf(part->device.id, "%s.%d", dev->id, num);
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register_device(&part->device);
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num++;
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if(!*endp)
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break;
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if(*endp != ',') {
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printf("parse error\n");
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return 1;
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}
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endp++;
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}
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return 0;
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}
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static __maybe_unused char cmd_addpart_help[] =
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"Usage: addpart <partition description>\n"
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"addpart adds a partition description to a device. The partition description\n"
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"has the form\n"
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"dev:size1(name1)[ro],size2(name2)[ro],...\n"
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"<dev> is the device name under /dev. Size can be given in decimal or if\n"
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"prefixed with 0x in hex. Sizes can have an optional suffix K,M,G. The size\n"
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"of the last partition can be specified as '-' for the remaining space of the\n"
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"device.\n"
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"This format is the same as used in the Linux kernel for cmdline mtd partitions.\n"
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"Note That this command has to be reworked and will probably change it's API.";
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U_BOOT_CMD_START(addpart)
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.maxargs = 2,
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.cmd = do_addpart,
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.usage = "add a partition table to a device",
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U_BOOT_CMD_HELP(cmd_addpart_help)
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U_BOOT_CMD_END
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int do_delpart ( cmd_tbl_t *cmdtp, int flag, int argc, char *argv[])
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{
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struct device_d *dev;
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if (argc != 2) {
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printf ("Usage:\n%s\n", cmdtp->usage);
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return 1;
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}
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dev = device_from_spec_str(argv[1], NULL);
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if (!dev) {
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printf("no such device: %s\n",argv[1]);
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return 1;
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}
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dev_del_partitions(dev);
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return 0;
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}
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static __maybe_unused char cmd_delpart_help[] =
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"Usage: delpart <dev>\n"
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"Delete partitions previously added to a device with addpart.\n"
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"Note: You have to specify the device as 'devid', _not_ as '/dev/devid'. This\n"
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"will likely change soon.\n";
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U_BOOT_CMD_START(delpart)
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.maxargs = 2,
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.cmd = do_delpart,
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.usage = "delete a partition table from a device",
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U_BOOT_CMD_HELP(cmd_delpart_help)
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U_BOOT_CMD_END
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