1 /* 2 * Copyright 2014 Broadcom Corporation. 3 * Copyright 2015 Free Electrons. 4 * 5 * SPDX-License-Identifier: GPL-2.0+ 6 */ 7 8 #include <config.h> 9 #include <common.h> 10 11 #include <fastboot.h> 12 #include <image-sparse.h> 13 14 #include <linux/mtd/mtd.h> 15 #include <jffs2/jffs2.h> 16 #include <nand.h> 17 18 struct fb_nand_sparse { 19 struct mtd_info *mtd; 20 struct part_info *part; 21 }; 22 23 __weak int board_fastboot_erase_partition_setup(char *name) 24 { 25 return 0; 26 } 27 28 __weak int board_fastboot_write_partition_setup(char *name) 29 { 30 return 0; 31 } 32 33 static int fb_nand_lookup(const char *partname, 34 struct mtd_info **mtd, 35 struct part_info **part) 36 { 37 struct mtd_device *dev; 38 int ret; 39 u8 pnum; 40 41 ret = mtdparts_init(); 42 if (ret) { 43 error("Cannot initialize MTD partitions\n"); 44 fastboot_fail("cannot init mtdparts"); 45 return ret; 46 } 47 48 ret = find_dev_and_part(partname, &dev, &pnum, part); 49 if (ret) { 50 error("cannot find partition: '%s'", partname); 51 fastboot_fail("cannot find partition"); 52 return ret; 53 } 54 55 if (dev->id->type != MTD_DEV_TYPE_NAND) { 56 error("partition '%s' is not stored on a NAND device", 57 partname); 58 fastboot_fail("not a NAND device"); 59 return -EINVAL; 60 } 61 62 *mtd = get_nand_dev_by_index(dev->id->num); 63 64 return 0; 65 } 66 67 static int _fb_nand_erase(struct mtd_info *mtd, struct part_info *part) 68 { 69 nand_erase_options_t opts; 70 int ret; 71 72 memset(&opts, 0, sizeof(opts)); 73 opts.offset = part->offset; 74 opts.length = part->size; 75 opts.quiet = 1; 76 77 printf("Erasing blocks 0x%llx to 0x%llx\n", 78 part->offset, part->offset + part->size); 79 80 ret = nand_erase_opts(mtd, &opts); 81 if (ret) 82 return ret; 83 84 printf("........ erased 0x%llx bytes from '%s'\n", 85 part->size, part->name); 86 87 return 0; 88 } 89 90 static int _fb_nand_write(struct mtd_info *mtd, struct part_info *part, 91 void *buffer, unsigned int offset, 92 unsigned int length, size_t *written) 93 { 94 int flags = WITH_WR_VERIFY; 95 96 #ifdef CONFIG_FASTBOOT_FLASH_NAND_TRIMFFS 97 flags |= WITH_DROP_FFS; 98 #endif 99 100 return nand_write_skip_bad(mtd, offset, &length, written, 101 part->size - (offset - part->offset), 102 buffer, flags); 103 } 104 105 static lbaint_t fb_nand_sparse_write(struct sparse_storage *info, 106 lbaint_t blk, lbaint_t blkcnt, const void *buffer) 107 { 108 struct fb_nand_sparse *sparse = info->priv; 109 size_t written; 110 int ret; 111 112 ret = _fb_nand_write(sparse->mtd, sparse->part, (void *)buffer, 113 blk * info->blksz, 114 blkcnt * info->blksz, &written); 115 if (ret < 0) { 116 printf("Failed to write sparse chunk\n"); 117 return ret; 118 } 119 120 /* TODO - verify that the value "written" includes the "bad-blocks" ... */ 121 122 /* 123 * the return value must be 'blkcnt' ("good-blocks") plus the 124 * number of "bad-blocks" encountered within this space... 125 */ 126 return written / info->blksz; 127 } 128 129 static lbaint_t fb_nand_sparse_reserve(struct sparse_storage *info, 130 lbaint_t blk, lbaint_t blkcnt) 131 { 132 int bad_blocks = 0; 133 134 /* 135 * TODO - implement a function to determine the total number 136 * of blocks which must be used in order to reserve the specified 137 * number ("blkcnt") of "good-blocks", starting at "blk"... 138 * ( possibly something like the "check_skip_len()" function ) 139 */ 140 141 /* 142 * the return value must be 'blkcnt' ("good-blocks") plus the 143 * number of "bad-blocks" encountered within this space... 144 */ 145 return blkcnt + bad_blocks; 146 } 147 148 void fb_nand_flash_write(const char *cmd, void *download_buffer, 149 unsigned int download_bytes) 150 { 151 struct part_info *part; 152 struct mtd_info *mtd = NULL; 153 int ret; 154 155 ret = fb_nand_lookup(cmd, &mtd, &part); 156 if (ret) { 157 error("invalid NAND device"); 158 fastboot_fail("invalid NAND device"); 159 return; 160 } 161 162 ret = board_fastboot_write_partition_setup(part->name); 163 if (ret) 164 return; 165 166 if (is_sparse_image(download_buffer)) { 167 struct fb_nand_sparse sparse_priv; 168 struct sparse_storage sparse; 169 170 sparse_priv.mtd = mtd; 171 sparse_priv.part = part; 172 173 sparse.blksz = mtd->writesize; 174 sparse.start = part->offset / sparse.blksz; 175 sparse.size = part->size / sparse.blksz; 176 sparse.write = fb_nand_sparse_write; 177 sparse.reserve = fb_nand_sparse_reserve; 178 179 printf("Flashing sparse image at offset " LBAFU "\n", 180 sparse.start); 181 182 sparse.priv = &sparse_priv; 183 write_sparse_image(&sparse, cmd, download_buffer, 184 download_bytes); 185 } else { 186 printf("Flashing raw image at offset 0x%llx\n", 187 part->offset); 188 189 ret = _fb_nand_write(mtd, part, download_buffer, part->offset, 190 download_bytes, NULL); 191 192 printf("........ wrote %u bytes to '%s'\n", 193 download_bytes, part->name); 194 } 195 196 if (ret) { 197 fastboot_fail("error writing the image"); 198 return; 199 } 200 201 fastboot_okay(""); 202 } 203 204 void fb_nand_erase(const char *cmd) 205 { 206 struct part_info *part; 207 struct mtd_info *mtd = NULL; 208 int ret; 209 210 ret = fb_nand_lookup(cmd, &mtd, &part); 211 if (ret) { 212 error("invalid NAND device"); 213 fastboot_fail("invalid NAND device"); 214 return; 215 } 216 217 ret = board_fastboot_erase_partition_setup(part->name); 218 if (ret) 219 return; 220 221 ret = _fb_nand_erase(mtd, part); 222 if (ret) { 223 error("failed erasing from device %s", mtd->name); 224 fastboot_fail("failed erasing from device"); 225 return; 226 } 227 228 fastboot_okay(""); 229 } 230