^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) * Parse RedBoot-style Flash Image System (FIS) tables and
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 4) * produce a Linux partition array to match.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 5) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 6) * Copyright © 2001 Red Hat UK Limited
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 7) * Copyright © 2001-2010 David Woodhouse <dwmw2@infradead.org>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 8) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 9)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) #include <linux/kernel.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) #include <linux/slab.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) #include <linux/init.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) #include <linux/vmalloc.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) #include <linux/of.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) #include <linux/mtd/mtd.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) #include <linux/mtd/partitions.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) #include <linux/module.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) struct fis_image_desc {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) unsigned char name[16]; // Null terminated name
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) uint32_t flash_base; // Address within FLASH of image
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) uint32_t mem_base; // Address in memory where it executes
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) uint32_t size; // Length of image
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) uint32_t entry_point; // Execution entry point
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) uint32_t data_length; // Length of actual data
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) unsigned char _pad[256-(16+7*sizeof(uint32_t))];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) uint32_t desc_cksum; // Checksum over image descriptor
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) uint32_t file_cksum; // Checksum over image data
^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) struct fis_list {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) struct fis_image_desc *img;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) struct fis_list *next;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) static int directory = CONFIG_MTD_REDBOOT_DIRECTORY_BLOCK;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) module_param(directory, int, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) static inline int redboot_checksum(struct fis_image_desc *img)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) /* RedBoot doesn't actually write the desc_cksum field yet AFAICT */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) return 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) static void parse_redboot_of(struct mtd_info *master)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) struct device_node *np;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) struct device_node *npart;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) u32 dirblock;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) np = mtd_get_of_node(master);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) if (!np)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56) npart = of_get_child_by_name(np, "partitions");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) if (!npart)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60) ret = of_property_read_u32(npart, "fis-index-block", &dirblock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61) if (ret)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65) * Assign the block found in the device tree to the local
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66) * directory block pointer.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68) directory = dirblock;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71) static int parse_redboot_partitions(struct mtd_info *master,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72) const struct mtd_partition **pparts,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73) struct mtd_part_parser_data *data)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75) int nrparts = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76) struct fis_image_desc *buf;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77) struct mtd_partition *parts;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78) struct fis_list *fl = NULL, *tmp_fl;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79) int ret, i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 80) size_t retlen;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 81) char *names;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 82) char *nullname;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 83) int namelen = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 84) int nulllen = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 85) int numslots;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 86) unsigned long offset;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 87) #ifdef CONFIG_MTD_REDBOOT_PARTS_UNALLOCATED
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 88) static char nullstring[] = "unallocated";
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 89) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 90)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 91) parse_redboot_of(master);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 92)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 93) if ( directory < 0 ) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 94) offset = master->size + directory * master->erasesize;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 95) while (mtd_block_isbad(master, offset)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 96) if (!offset) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 97) nogood:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 98) printk(KERN_NOTICE "Failed to find a non-bad block to check for RedBoot partition table\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 99) return -EIO;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) offset -= master->erasesize;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) offset = directory * master->erasesize;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) while (mtd_block_isbad(master, offset)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) offset += master->erasesize;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) if (offset == master->size)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) goto nogood;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) buf = vmalloc(master->erasesize);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) if (!buf)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) printk(KERN_NOTICE "Searching for RedBoot partition table in %s at offset 0x%lx\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) master->name, offset);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) ret = mtd_read(master, offset, master->erasesize, &retlen,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) (void *)buf);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) if (ret)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) if (retlen != master->erasesize) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) ret = -EIO;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) numslots = (master->erasesize / sizeof(struct fis_image_desc));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) for (i = 0; i < numslots; i++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) if (!memcmp(buf[i].name, "FIS directory", 14)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) /* This is apparently the FIS directory entry for the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) * FIS directory itself. The FIS directory size is
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) * one erase block; if the buf[i].size field is
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) * swab32(erasesize) then we know we are looking at
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137) * a byte swapped FIS directory - swap all the entries!
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) * (NOTE: this is 'size' not 'data_length'; size is
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) * the full size of the entry.)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142) /* RedBoot can combine the FIS directory and
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143) config partitions into a single eraseblock;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) we assume wrong-endian if either the swapped
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145) 'size' matches the eraseblock size precisely,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146) or if the swapped size actually fits in an
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) eraseblock while the unswapped size doesn't. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148) if (swab32(buf[i].size) == master->erasesize ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149) (buf[i].size > master->erasesize
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150) && swab32(buf[i].size) < master->erasesize)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151) int j;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152) /* Update numslots based on actual FIS directory size */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153) numslots = swab32(buf[i].size) / sizeof (struct fis_image_desc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154) for (j = 0; j < numslots; ++j) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156) /* A single 0xff denotes a deleted entry.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157) * Two of them in a row is the end of the table.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159) if (buf[j].name[0] == 0xff) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160) if (buf[j].name[1] == 0xff) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163) continue;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167) /* The unsigned long fields were written with the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168) * wrong byte sex, name and pad have no byte sex.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170) swab32s(&buf[j].flash_base);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171) swab32s(&buf[j].mem_base);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172) swab32s(&buf[j].size);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173) swab32s(&buf[j].entry_point);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174) swab32s(&buf[j].data_length);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175) swab32s(&buf[j].desc_cksum);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176) swab32s(&buf[j].file_cksum);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178) } else if (buf[i].size < master->erasesize) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 179) /* Update numslots based on actual FIS directory size */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 180) numslots = buf[i].size / sizeof(struct fis_image_desc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 181) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 182) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 183) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 184) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 185) if (i == numslots) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 186) /* Didn't find it */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 187) printk(KERN_NOTICE "No RedBoot partition table detected in %s\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 188) master->name);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 189) ret = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 190) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 191) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 192)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 193) for (i = 0; i < numslots; i++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 194) struct fis_list *new_fl, **prev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 195)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 196) if (buf[i].name[0] == 0xff) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 197) if (buf[i].name[1] == 0xff) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 198) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 199) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 200) continue;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 201) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 202) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 203) if (!redboot_checksum(&buf[i]))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 204) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 205)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 206) new_fl = kmalloc(sizeof(struct fis_list), GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 207) namelen += strlen(buf[i].name)+1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 208) if (!new_fl) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 209) ret = -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 210) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 211) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 212) new_fl->img = &buf[i];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 213) if (data && data->origin)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 214) buf[i].flash_base -= data->origin;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 215) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 216) buf[i].flash_base &= master->size-1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 217)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 218) /* I'm sure the JFFS2 code has done me permanent damage.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 219) * I now think the following is _normal_
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 220) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 221) prev = &fl;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 222) while(*prev && (*prev)->img->flash_base < new_fl->img->flash_base)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 223) prev = &(*prev)->next;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 224) new_fl->next = *prev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 225) *prev = new_fl;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 226)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 227) nrparts++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 228) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 229) #ifdef CONFIG_MTD_REDBOOT_PARTS_UNALLOCATED
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 230) if (fl->img->flash_base) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 231) nrparts++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 232) nulllen = sizeof(nullstring);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 233) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 234)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 235) for (tmp_fl = fl; tmp_fl->next; tmp_fl = tmp_fl->next) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 236) if (tmp_fl->img->flash_base + tmp_fl->img->size + master->erasesize <= tmp_fl->next->img->flash_base) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 237) nrparts++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 238) nulllen = sizeof(nullstring);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 239) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 240) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 241) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 242) parts = kzalloc(sizeof(*parts)*nrparts + nulllen + namelen, GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 243)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 244) if (!parts) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 245) ret = -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 246) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 247) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 248)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 249) nullname = (char *)&parts[nrparts];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 250) #ifdef CONFIG_MTD_REDBOOT_PARTS_UNALLOCATED
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 251) if (nulllen > 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 252) strcpy(nullname, nullstring);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 253) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 254) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 255) names = nullname + nulllen;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 256)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 257) i=0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 258)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 259) #ifdef CONFIG_MTD_REDBOOT_PARTS_UNALLOCATED
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 260) if (fl->img->flash_base) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 261) parts[0].name = nullname;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 262) parts[0].size = fl->img->flash_base;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 263) parts[0].offset = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 264) i++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 265) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 266) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 267) for ( ; i<nrparts; i++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 268) parts[i].size = fl->img->size;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 269) parts[i].offset = fl->img->flash_base;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 270) parts[i].name = names;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 271)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 272) strcpy(names, fl->img->name);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 273) #ifdef CONFIG_MTD_REDBOOT_PARTS_READONLY
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 274) if (!memcmp(names, "RedBoot", 8) ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 275) !memcmp(names, "RedBoot config", 15) ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 276) !memcmp(names, "FIS directory", 14)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 277) parts[i].mask_flags = MTD_WRITEABLE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 278) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 279) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 280) names += strlen(names)+1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 281)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 282) #ifdef CONFIG_MTD_REDBOOT_PARTS_UNALLOCATED
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 283) if(fl->next && fl->img->flash_base + fl->img->size + master->erasesize <= fl->next->img->flash_base) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 284) i++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 285) parts[i].offset = parts[i-1].size + parts[i-1].offset;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 286) parts[i].size = fl->next->img->flash_base - parts[i].offset;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 287) parts[i].name = nullname;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 288) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 289) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 290) tmp_fl = fl;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 291) fl = fl->next;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 292) kfree(tmp_fl);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 293) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 294) ret = nrparts;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 295) *pparts = parts;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 296) out:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 297) while (fl) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 298) struct fis_list *old = fl;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 299) fl = fl->next;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 300) kfree(old);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 301) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 302) vfree(buf);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 303) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 304) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 305)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 306) static const struct of_device_id mtd_parser_redboot_of_match_table[] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 307) { .compatible = "redboot-fis" },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 308) {},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 309) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 310) MODULE_DEVICE_TABLE(of, mtd_parser_redboot_of_match_table);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 311)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 312) static struct mtd_part_parser redboot_parser = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 313) .parse_fn = parse_redboot_partitions,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 314) .name = "RedBoot",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 315) .of_match_table = mtd_parser_redboot_of_match_table,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 316) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 317) module_mtd_part_parser(redboot_parser);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 318)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 319) /* mtd parsers will request the module by parser name */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 320) MODULE_ALIAS("RedBoot");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 321) MODULE_LICENSE("GPL");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 322) MODULE_AUTHOR("David Woodhouse <dwmw2@infradead.org>");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 323) MODULE_DESCRIPTION("Parsing code for RedBoot Flash Image System (FIS) tables");
Orange Pi5 kernel
Deprecated Linux kernel 5.10.110 for OrangePi 5/5B/5+ boards
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