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Diffstat (limited to 'ANDROID_3.4.5/drivers/mtd/cmdlinepart.c')
-rw-r--r--ANDROID_3.4.5/drivers/mtd/cmdlinepart.c404
1 files changed, 0 insertions, 404 deletions
diff --git a/ANDROID_3.4.5/drivers/mtd/cmdlinepart.c b/ANDROID_3.4.5/drivers/mtd/cmdlinepart.c
deleted file mode 100644
index 278df88d..00000000
--- a/ANDROID_3.4.5/drivers/mtd/cmdlinepart.c
+++ /dev/null
@@ -1,404 +0,0 @@
-/*
- * Read flash partition table from command line
- *
- * Copyright © 2002 SYSGO Real-Time Solutions GmbH
- * Copyright © 2002-2010 David Woodhouse <dwmw2@infradead.org>
- *
- * 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., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
- *
- * The format for the command line is as follows:
- *
- * mtdparts=<mtddef>[;<mtddef]
- * <mtddef> := <mtd-id>:<partdef>[,<partdef>]
- * where <mtd-id> is the name from the "cat /proc/mtd" command
- * <partdef> := <size>[@offset][<name>][ro][lk]
- * <mtd-id> := unique name used in mapping driver/device (mtd->name)
- * <size> := standard linux memsize OR "-" to denote all remaining space
- * <name> := '(' NAME ')'
- *
- * Examples:
- *
- * 1 NOR Flash, with 1 single writable partition:
- * edb7312-nor:-
- *
- * 1 NOR Flash with 2 partitions, 1 NAND with one
- * edb7312-nor:256k(ARMboot)ro,-(root);edb7312-nand:-(home)
- */
-
-#include <linux/kernel.h>
-#include <linux/slab.h>
-
-#include <linux/mtd/mtd.h>
-#include <linux/mtd/partitions.h>
-#include <linux/bootmem.h>
-#include <linux/module.h>
-
-/* error message prefix */
-#define ERRP "mtd: "
-
-/* debug macro */
-#if 0
-#define dbg(x) do { printk("DEBUG-CMDLINE-PART: "); printk x; } while(0)
-#else
-#define dbg(x)
-#endif
-
-
-/* special size referring to all the remaining space in a partition */
-#define SIZE_REMAINING UINT_MAX
-#define OFFSET_CONTINUOUS UINT_MAX
-
-struct cmdline_mtd_partition {
- struct cmdline_mtd_partition *next;
- char *mtd_id;
- int num_parts;
- struct mtd_partition *parts;
-};
-
-/* mtdpart_setup() parses into here */
-static struct cmdline_mtd_partition *partitions;
-
-/* the command line passed to mtdpart_setupd() */
-static char *cmdline;
-static int cmdline_parsed = 0;
-
-/*
- * Parse one partition definition for an MTD. Since there can be many
- * comma separated partition definitions, this function calls itself
- * recursively until no more partition definitions are found. Nice side
- * effect: the memory to keep the mtd_partition structs and the names
- * is allocated upon the last definition being found. At that point the
- * syntax has been verified ok.
- */
-static struct mtd_partition * newpart(char *s,
- char **retptr,
- int *num_parts,
- int this_part,
- unsigned char **extra_mem_ptr,
- int extra_mem_size)
-{
- struct mtd_partition *parts;
- unsigned long long size;
- unsigned long long offset = OFFSET_CONTINUOUS;
- char *name;
- int name_len;
- unsigned char *extra_mem;
- char delim;
- unsigned int mask_flags;
-
- /* fetch the partition size */
- if (*s == '-')
- { /* assign all remaining space to this partition */
- size = SIZE_REMAINING;
- s++;
- }
- else
- {
- size = memparse(s, &s);
- if (size < PAGE_SIZE)
- {
- printk(KERN_ERR ERRP "partition size too small (%lx)\n", size);
- return NULL;
- }
- }
-
- /* fetch partition name and flags */
- mask_flags = 0; /* this is going to be a regular partition */
- delim = 0;
- /* check for offset */
- if (*s == '@')
- {
- s++;
- offset = memparse(s, &s);
- }
- /* now look for name */
- if (*s == '(')
- {
- delim = ')';
- }
-
- if (delim)
- {
- char *p;
-
- name = ++s;
- p = strchr(name, delim);
- if (!p)
- {
- printk(KERN_ERR ERRP "no closing %c found in partition name\n", delim);
- return NULL;
- }
- name_len = p - name;
- s = p + 1;
- }
- else
- {
- name = NULL;
- name_len = 13; /* Partition_000 */
- }
-
- /* record name length for memory allocation later */
- extra_mem_size += name_len + 1;
-
- /* test for options */
- if (strncmp(s, "ro", 2) == 0)
- {
- mask_flags |= MTD_WRITEABLE;
- s += 2;
- }
-
- /* if lk is found do NOT unlock the MTD partition*/
- if (strncmp(s, "lk", 2) == 0)
- {
- mask_flags |= MTD_POWERUP_LOCK;
- s += 2;
- }
-
- /* test if more partitions are following */
- if (*s == ',')
- {
- if (size == SIZE_REMAINING)
- {
- printk(KERN_ERR ERRP "no partitions allowed after a fill-up partition\n");
- return NULL;
- }
- /* more partitions follow, parse them */
- parts = newpart(s + 1, &s, num_parts, this_part + 1,
- &extra_mem, extra_mem_size);
- if (!parts)
- return NULL;
- }
- else
- { /* this is the last partition: allocate space for all */
- int alloc_size;
-
- *num_parts = this_part + 1;
- alloc_size = *num_parts * sizeof(struct mtd_partition) +
- extra_mem_size;
- parts = kzalloc(alloc_size, GFP_KERNEL);
- if (!parts)
- return NULL;
- extra_mem = (unsigned char *)(parts + *num_parts);
- }
- /* enter this partition (offset will be calculated later if it is zero at this point) */
- parts[this_part].size = size;
- parts[this_part].offset = offset;
- parts[this_part].mask_flags = mask_flags;
- if (name)
- {
- strlcpy(extra_mem, name, name_len + 1);
- }
- else
- {
- sprintf(extra_mem, "Partition_%03d", this_part);
- }
- parts[this_part].name = extra_mem;
- extra_mem += name_len + 1;
-
- dbg(("partition %d: name <%s>, offset %llx, size %llx, mask flags %x\n",
- this_part,
- parts[this_part].name,
- parts[this_part].offset,
- parts[this_part].size,
- parts[this_part].mask_flags));
-
- /* return (updated) pointer to extra_mem memory */
- if (extra_mem_ptr)
- *extra_mem_ptr = extra_mem;
-
- /* return (updated) pointer command line string */
- *retptr = s;
-
- /* return partition table */
- return parts;
-}
-
-/*
- * Parse the command line.
- */
-static int mtdpart_setup_real(char *s)
-{
- cmdline_parsed = 1;
-
- for( ; s != NULL; )
- {
- struct cmdline_mtd_partition *this_mtd;
- struct mtd_partition *parts;
- int mtd_id_len;
- int num_parts;
- char *p, *mtd_id;
-
- mtd_id = s;
- /* fetch <mtd-id> */
- if (!(p = strchr(s, ':')))
- {
- printk(KERN_ERR ERRP "no mtd-id\n");
- return 0;
- }
- mtd_id_len = p - mtd_id;
-
- dbg(("parsing <%s>\n", p+1));
-
- /*
- * parse one mtd. have it reserve memory for the
- * struct cmdline_mtd_partition and the mtd-id string.
- */
- parts = newpart(p + 1, /* cmdline */
- &s, /* out: updated cmdline ptr */
- &num_parts, /* out: number of parts */
- 0, /* first partition */
- (unsigned char**)&this_mtd, /* out: extra mem */
- mtd_id_len + 1 + sizeof(*this_mtd) +
- sizeof(void*)-1 /*alignment*/);
- if(!parts)
- {
- /*
- * An error occurred. We're either:
- * a) out of memory, or
- * b) in the middle of the partition spec
- * Either way, this mtd is hosed and we're
- * unlikely to succeed in parsing any more
- */
- return 0;
- }
-
- /* align this_mtd */
- this_mtd = (struct cmdline_mtd_partition *)
- ALIGN((unsigned long)this_mtd, sizeof(void*));
- /* enter results */
- this_mtd->parts = parts;
- this_mtd->num_parts = num_parts;
- this_mtd->mtd_id = (char*)(this_mtd + 1);
- strlcpy(this_mtd->mtd_id, mtd_id, mtd_id_len + 1);
-
- /* link into chain */
- this_mtd->next = partitions;
- partitions = this_mtd;
-
- dbg(("mtdid=<%s> num_parts=<%d>\n",
- this_mtd->mtd_id, this_mtd->num_parts));
-
-
- /* EOS - we're done */
- if (*s == 0)
- break;
-
- /* does another spec follow? */
- if (*s != ';')
- {
- printk(KERN_ERR ERRP "bad character after partition (%c)\n", *s);
- return 0;
- }
- s++;
- }
- return 1;
-}
-#ifdef CONFIG_MTD_NAND_WMT
-extern struct mtd_partition nand_partitions[];
-#endif
-/*
- * Main function to be called from the MTD mapping driver/device to
- * obtain the partitioning information. At this point the command line
- * arguments will actually be parsed and turned to struct mtd_partition
- * information. It returns partitions for the requested mtd device, or
- * the first one in the chain if a NULL mtd_id is passed in.
- */
-static int parse_cmdline_partitions(struct mtd_info *master,
- struct mtd_partition **pparts,
- struct mtd_part_parser_data *data)
-{
- unsigned long long offset;
- int i;
- struct cmdline_mtd_partition *part;
- const char *mtd_id = master->name;
-
- /* parse command line */
- if (!cmdline_parsed)
- mtdpart_setup_real(cmdline);
-
- for(part = partitions; part; part = part->next)
- {
- if ((!mtd_id) || (!strcmp(part->mtd_id, mtd_id)))
- {
- for(i = 0, offset = 0; i < part->num_parts; i++)
- {
- if (part->parts[i].offset == OFFSET_CONTINUOUS)
- part->parts[i].offset = offset;
- else
- offset = part->parts[i].offset;
- if (part->parts[i].size == SIZE_REMAINING)
- part->parts[i].size = master->size - offset;
- if (offset + part->parts[i].size > master->size)
- {
- printk(KERN_WARNING ERRP
- "%s: partitioning exceeds flash size, truncating\n",
- part->mtd_id);
- part->parts[i].size = master->size - offset;
- part->num_parts = i;
- }
- offset += part->parts[i].size;
- }
- #ifdef CONFIG_MTD_NAND_WMT
- if (!strcmp(part->mtd_id, "WMT.nand")) {
- for (i = 0; i < part->num_parts; i++) {
- strcpy(nand_partitions[i].name, part->parts[i].name);
- nand_partitions[i].offset = part->parts[i].offset;
- nand_partitions[i].size = part->parts[i].size;
- }
- }
- #endif
- *pparts = kmemdup(part->parts,
- sizeof(*part->parts) * part->num_parts,
- GFP_KERNEL);
- if (!*pparts)
- return -ENOMEM;
- return part->num_parts;
- }
- }
- return 0;
-}
-
-
-/*
- * This is the handler for our kernel parameter, called from
- * main.c::checksetup(). Note that we can not yet kmalloc() anything,
- * so we only save the commandline for later processing.
- *
- * This function needs to be visible for bootloaders.
- */
-static int mtdpart_setup(char *s)
-{
- cmdline = s;
- return 1;
-}
-
-__setup("mtdparts=", mtdpart_setup);
-
-static struct mtd_part_parser cmdline_parser = {
- .owner = THIS_MODULE,
- .parse_fn = parse_cmdline_partitions,
- .name = "cmdlinepart",
-};
-
-static int __init cmdline_parser_init(void)
-{
- return register_mtd_parser(&cmdline_parser);
-}
-
-module_init(cmdline_parser_init);
-
-MODULE_LICENSE("GPL");
-MODULE_AUTHOR("Marius Groeger <mag@sysgo.de>");
-MODULE_DESCRIPTION("Command line configuration of MTD partitions");
generated by cgit (git 2.34.1) at 2025-07-10 03:17:02 +0000