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67 lines
1.4 KiB
67 lines
1.4 KiB
// SPDX-License-Identifier: GPL-2.0 |
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/* |
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* Copyright (C) 2021 Rafał Miłecki <[email protected]> |
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*/ |
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#include <linux/module.h> |
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#include <linux/init.h> |
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#include <linux/of.h> |
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#include <linux/mtd/mtd.h> |
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#include <linux/slab.h> |
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#include <linux/mtd/partitions.h> |
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#include "ofpart_bcm4908.h" |
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#define BLPARAMS_FW_OFFSET "NAND_RFS_OFS" |
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static long long bcm4908_partitions_fw_offset(void) |
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{ |
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struct device_node *root; |
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struct property *prop; |
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const char *s; |
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root = of_find_node_by_path("/"); |
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if (!root) |
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return -ENOENT; |
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of_property_for_each_string(root, "brcm_blparms", prop, s) { |
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size_t len = strlen(BLPARAMS_FW_OFFSET); |
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unsigned long offset; |
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int err; |
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if (strncmp(s, BLPARAMS_FW_OFFSET, len) || s[len] != '=') |
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continue; |
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err = kstrtoul(s + len + 1, 0, &offset); |
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if (err) { |
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pr_err("failed to parse %s\n", s + len + 1); |
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of_node_put(root); |
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return err; |
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} |
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of_node_put(root); |
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return offset << 10; |
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} |
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of_node_put(root); |
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return -ENOENT; |
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} |
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int bcm4908_partitions_post_parse(struct mtd_info *mtd, struct mtd_partition *parts, int nr_parts) |
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{ |
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long long fw_offset; |
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int i; |
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fw_offset = bcm4908_partitions_fw_offset(); |
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for (i = 0; i < nr_parts; i++) { |
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if (of_device_is_compatible(parts[i].of_node, "brcm,bcm4908-firmware")) { |
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if (fw_offset < 0 || parts[i].offset == fw_offset) |
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parts[i].name = "firmware"; |
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else |
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parts[i].name = "backup"; |
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} |
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} |
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return 0; |
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}
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