diff options
Diffstat (limited to 'drivers/mtd/ofpart.c')
| -rw-r--r-- | drivers/mtd/ofpart.c | 233 |
1 files changed, 0 insertions, 233 deletions
diff --git a/drivers/mtd/ofpart.c b/drivers/mtd/ofpart.c deleted file mode 100644 index 2861c7079d7b..000000000000 --- a/drivers/mtd/ofpart.c +++ /dev/null @@ -1,233 +0,0 @@ -/* - * Flash partitions described by the OF (or flattened) device tree - * - * Copyright © 2006 MontaVista Software Inc. - * Author: Vitaly Wool <vwool@ru.mvista.com> - * - * Revised to handle newer style flash binding by: - * Copyright © 2007 David Gibson, IBM Corporation. - * - * 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. - */ - -#include <linux/module.h> -#include <linux/init.h> -#include <linux/of.h> -#include <linux/mtd/mtd.h> -#include <linux/slab.h> -#include <linux/mtd/partitions.h> - -static bool node_has_compatible(struct device_node *pp) -{ - return of_get_property(pp, "compatible", NULL); -} - -static int parse_ofpart_partitions(struct mtd_info *master, - const struct mtd_partition **pparts, - struct mtd_part_parser_data *data) -{ - struct mtd_partition *parts; - struct device_node *mtd_node; - struct device_node *ofpart_node; - const char *partname; - struct device_node *pp; - int nr_parts, i, ret = 0; - bool dedicated = true; - - - /* Pull of_node from the master device node */ - mtd_node = mtd_get_of_node(master); - if (!mtd_node) - return 0; - - ofpart_node = of_get_child_by_name(mtd_node, "partitions"); - if (!ofpart_node) { - /* - * We might get here even when ofpart isn't used at all (e.g., - * when using another parser), so don't be louder than - * KERN_DEBUG - */ - pr_debug("%s: 'partitions' subnode not found on %s. Trying to parse direct subnodes as partitions.\n", - master->name, mtd_node->full_name); - ofpart_node = mtd_node; - dedicated = false; - } else if (!of_device_is_compatible(ofpart_node, "fixed-partitions")) { - /* The 'partitions' subnode might be used by another parser */ - return 0; - } - - /* First count the subnodes */ - nr_parts = 0; - for_each_child_of_node(ofpart_node, pp) { - if (!dedicated && node_has_compatible(pp)) - continue; - - nr_parts++; - } - - if (nr_parts == 0) - return 0; - - parts = kzalloc(nr_parts * sizeof(*parts), GFP_KERNEL); - if (!parts) - return -ENOMEM; - - i = 0; - for_each_child_of_node(ofpart_node, pp) { - const __be32 *reg; - int len; - int a_cells, s_cells; - - if (!dedicated && node_has_compatible(pp)) - continue; - - reg = of_get_property(pp, "reg", &len); - if (!reg) { - if (dedicated) { - pr_debug("%s: ofpart partition %s (%s) missing reg property.\n", - master->name, pp->full_name, - mtd_node->full_name); - goto ofpart_fail; - } else { - nr_parts--; - continue; - } - } - - a_cells = of_n_addr_cells(pp); - s_cells = of_n_size_cells(pp); - if (len / 4 != a_cells + s_cells) { - pr_debug("%s: ofpart partition %s (%s) error parsing reg property.\n", - master->name, pp->full_name, - mtd_node->full_name); - goto ofpart_fail; - } - - parts[i].offset = of_read_number(reg, a_cells); - parts[i].size = of_read_number(reg + a_cells, s_cells); - parts[i].of_node = pp; - - partname = of_get_property(pp, "label", &len); - if (!partname) - partname = of_get_property(pp, "name", &len); - parts[i].name = partname; - - if (of_get_property(pp, "read-only", &len)) - parts[i].mask_flags |= MTD_WRITEABLE; - - if (of_get_property(pp, "lock", &len)) - parts[i].mask_flags |= MTD_POWERUP_LOCK; - - i++; - } - - if (!nr_parts) - goto ofpart_none; - - *pparts = parts; - return nr_parts; - -ofpart_fail: - pr_err("%s: error parsing ofpart partition %s (%s)\n", - master->name, pp->full_name, mtd_node->full_name); - ret = -EINVAL; -ofpart_none: - of_node_put(pp); - kfree(parts); - return ret; -} - -static struct mtd_part_parser ofpart_parser = { - .parse_fn = parse_ofpart_partitions, - .name = "ofpart", -}; - -static int parse_ofoldpart_partitions(struct mtd_info *master, - const struct mtd_partition **pparts, - struct mtd_part_parser_data *data) -{ - struct mtd_partition *parts; - struct device_node *dp; - int i, plen, nr_parts; - const struct { - __be32 offset, len; - } *part; - const char *names; - - /* Pull of_node from the master device node */ - dp = mtd_get_of_node(master); - if (!dp) - return 0; - - part = of_get_property(dp, "partitions", &plen); - if (!part) - return 0; /* No partitions found */ - - pr_warn("Device tree uses obsolete partition map binding: %s\n", - dp->full_name); - - nr_parts = plen / sizeof(part[0]); - - parts = kzalloc(nr_parts * sizeof(*parts), GFP_KERNEL); - if (!parts) - return -ENOMEM; - - names = of_get_property(dp, "partition-names", &plen); - - for (i = 0; i < nr_parts; i++) { - parts[i].offset = be32_to_cpu(part->offset); - parts[i].size = be32_to_cpu(part->len) & ~1; - /* bit 0 set signifies read only partition */ - if (be32_to_cpu(part->len) & 1) - parts[i].mask_flags = MTD_WRITEABLE; - - if (names && (plen > 0)) { - int len = strlen(names) + 1; - - parts[i].name = names; - plen -= len; - names += len; - } else { - parts[i].name = "unnamed"; - } - - part++; - } - - *pparts = parts; - return nr_parts; -} - -static struct mtd_part_parser ofoldpart_parser = { - .parse_fn = parse_ofoldpart_partitions, - .name = "ofoldpart", -}; - -static int __init ofpart_parser_init(void) -{ - register_mtd_parser(&ofpart_parser); - register_mtd_parser(&ofoldpart_parser); - return 0; -} - -static void __exit ofpart_parser_exit(void) -{ - deregister_mtd_parser(&ofpart_parser); - deregister_mtd_parser(&ofoldpart_parser); -} - -module_init(ofpart_parser_init); -module_exit(ofpart_parser_exit); - -MODULE_LICENSE("GPL"); -MODULE_DESCRIPTION("Parser for MTD partitioning information in device tree"); -MODULE_AUTHOR("Vitaly Wool, David Gibson"); -/* - * When MTD core cannot find the requested parser, it tries to load the module - * with the same name. Since we provide the ofoldpart parser, we should have - * the corresponding alias. - */ -MODULE_ALIAS("ofoldpart"); |