^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1) // SPDX-License-Identifier: GPL-2.0-or-later
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3) * Copyright © 2007 Eugene Konev <ejka@openwrt.org>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 4) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 5) * TI AR7 flash partition table.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 6) * Based on ar7 map by Felix Fietkau <nbd@openwrt.org>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 7) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 8)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 9) #include <linux/kernel.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) #include <linux/slab.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) #include <linux/mtd/mtd.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) #include <linux/mtd/partitions.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) #include <linux/memblock.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) #include <linux/module.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) #include <uapi/linux/magic.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) #define AR7_PARTS 4
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) #define ROOT_OFFSET 0xe0000
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) #define LOADER_MAGIC1 le32_to_cpu(0xfeedfa42)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) #define LOADER_MAGIC2 le32_to_cpu(0xfeed1281)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) struct ar7_bin_rec {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) unsigned int checksum;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) unsigned int length;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) unsigned int address;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) static int create_mtd_partitions(struct mtd_info *master,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) const struct mtd_partition **pparts,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) struct mtd_part_parser_data *data)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) struct ar7_bin_rec header;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) unsigned int offset;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) size_t len;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) unsigned int pre_size = master->erasesize, post_size = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) unsigned int root_offset = ROOT_OFFSET;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) int retries = 10;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) struct mtd_partition *ar7_parts;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) ar7_parts = kcalloc(AR7_PARTS, sizeof(*ar7_parts), GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) if (!ar7_parts)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) ar7_parts[0].name = "loader";
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) ar7_parts[0].offset = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) ar7_parts[0].size = master->erasesize;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) ar7_parts[0].mask_flags = MTD_WRITEABLE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) ar7_parts[1].name = "config";
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) ar7_parts[1].offset = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54) ar7_parts[1].size = master->erasesize;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55) ar7_parts[1].mask_flags = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) do { /* Try 10 blocks starting from master->erasesize */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58) offset = pre_size;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59) mtd_read(master, offset, sizeof(header), &len,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60) (uint8_t *)&header);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61) if (!strncmp((char *)&header, "TIENV0.8", 8))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62) ar7_parts[1].offset = pre_size;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63) if (header.checksum == LOADER_MAGIC1)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65) if (header.checksum == LOADER_MAGIC2)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67) pre_size += master->erasesize;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68) } while (retries--);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70) pre_size = offset;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72) if (!ar7_parts[1].offset) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73) ar7_parts[1].offset = master->size - master->erasesize;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74) post_size = master->erasesize;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77) switch (header.checksum) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78) case LOADER_MAGIC1:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79) while (header.length) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 80) offset += sizeof(header) + header.length;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 81) mtd_read(master, offset, sizeof(header), &len,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 82) (uint8_t *)&header);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 83) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 84) root_offset = offset + sizeof(header) + 4;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 85) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 86) case LOADER_MAGIC2:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 87) while (header.length) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 88) offset += sizeof(header) + header.length;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 89) mtd_read(master, offset, sizeof(header), &len,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 90) (uint8_t *)&header);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 91) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 92) root_offset = offset + sizeof(header) + 4 + 0xff;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 93) root_offset &= ~(uint32_t)0xff;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 94) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 95) default:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 96) printk(KERN_WARNING "Unknown magic: %08x\n", header.checksum);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 97) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 98) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 99)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) mtd_read(master, root_offset, sizeof(header), &len, (u8 *)&header);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) if (header.checksum != SQUASHFS_MAGIC) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) root_offset += master->erasesize - 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) root_offset &= ~(master->erasesize - 1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) ar7_parts[2].name = "linux";
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) ar7_parts[2].offset = pre_size;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) ar7_parts[2].size = master->size - pre_size - post_size;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) ar7_parts[2].mask_flags = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) ar7_parts[3].name = "rootfs";
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) ar7_parts[3].offset = root_offset;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) ar7_parts[3].size = master->size - root_offset - post_size;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) ar7_parts[3].mask_flags = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) *pparts = ar7_parts;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) return AR7_PARTS;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) static struct mtd_part_parser ar7_parser = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) .parse_fn = create_mtd_partitions,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) .name = "ar7part",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) module_mtd_part_parser(ar7_parser);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) MODULE_LICENSE("GPL");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) MODULE_AUTHOR( "Felix Fietkau <nbd@openwrt.org>, "
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) "Eugene Konev <ejka@openwrt.org>");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) MODULE_DESCRIPTION("MTD partitioning for TI AR7");
Orange Pi5 kernel
Deprecated Linux kernel 5.10.110 for OrangePi 5/5B/5+ boards
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