1 /* 2 * dfu.c -- DFU back-end routines 3 * 4 * Copyright (C) 2012 Samsung Electronics 5 * author: Lukasz Majewski <l.majewski@samsung.com> 6 * 7 * This program is free software; you can redistribute it and/or modify 8 * it under the terms of the GNU General Public License as published by 9 * the Free Software Foundation; either version 2 of the License, or 10 * (at your option) any later version. 11 * 12 * This program is distributed in the hope that it will be useful, 13 * but WITHOUT ANY WARRANTY; without even the implied warranty of 14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 15 * GNU General Public License for more details. 16 * 17 * You should have received a copy of the GNU General Public License 18 * along with this program; if not, write to the Free Software 19 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA 20 */ 21 22 #include <common.h> 23 #include <malloc.h> 24 #include <errno.h> 25 #include <div64.h> 26 #include <dfu.h> 27 28 enum dfu_mmc_op { 29 DFU_OP_READ = 1, 30 DFU_OP_WRITE, 31 }; 32 33 static unsigned char __aligned(CONFIG_SYS_CACHELINE_SIZE) 34 dfu_file_buf[CONFIG_SYS_DFU_MAX_FILE_SIZE]; 35 static long dfu_file_buf_len; 36 37 static int mmc_block_op(enum dfu_mmc_op op, struct dfu_entity *dfu, 38 u64 offset, void *buf, long *len) 39 { 40 char cmd_buf[DFU_CMD_BUF_SIZE]; 41 u32 blk_start, blk_count; 42 43 /* 44 * We must ensure that we work in lba_blk_size chunks, so ALIGN 45 * this value. 46 */ 47 *len = ALIGN(*len, dfu->data.mmc.lba_blk_size); 48 49 blk_start = dfu->data.mmc.lba_start + 50 (u32)lldiv(offset, dfu->data.mmc.lba_blk_size); 51 blk_count = *len / dfu->data.mmc.lba_blk_size; 52 if (blk_start + blk_count > 53 dfu->data.mmc.lba_start + dfu->data.mmc.lba_size) { 54 puts("Request would exceed designated area!\n"); 55 return -EINVAL; 56 } 57 58 sprintf(cmd_buf, "mmc %s %p %x %x", 59 op == DFU_OP_READ ? "read" : "write", 60 buf, blk_start, blk_count); 61 62 debug("%s: %s 0x%p\n", __func__, cmd_buf, cmd_buf); 63 return run_command(cmd_buf, 0); 64 } 65 66 static int mmc_file_buffer(struct dfu_entity *dfu, void *buf, long *len) 67 { 68 if (dfu_file_buf_len + *len > CONFIG_SYS_DFU_MAX_FILE_SIZE) { 69 dfu_file_buf_len = 0; 70 return -EINVAL; 71 } 72 73 /* Add to the current buffer. */ 74 memcpy(dfu_file_buf + dfu_file_buf_len, buf, *len); 75 dfu_file_buf_len += *len; 76 77 return 0; 78 } 79 80 static int mmc_file_op(enum dfu_mmc_op op, struct dfu_entity *dfu, 81 void *buf, long *len) 82 { 83 char cmd_buf[DFU_CMD_BUF_SIZE]; 84 char *str_env; 85 int ret; 86 87 switch (dfu->layout) { 88 case DFU_FS_FAT: 89 sprintf(cmd_buf, "fat%s mmc %d:%d 0x%x %s", 90 op == DFU_OP_READ ? "load" : "write", 91 dfu->data.mmc.dev, dfu->data.mmc.part, 92 (unsigned int) buf, dfu->name); 93 if (op == DFU_OP_WRITE) 94 sprintf(cmd_buf + strlen(cmd_buf), " %lx", *len); 95 break; 96 case DFU_FS_EXT4: 97 sprintf(cmd_buf, "ext4%s mmc %d:%d 0x%x /%s", 98 op == DFU_OP_READ ? "load" : "write", 99 dfu->data.mmc.dev, dfu->data.mmc.part, 100 (unsigned int) buf, dfu->name); 101 break; 102 default: 103 printf("%s: Layout (%s) not (yet) supported!\n", __func__, 104 dfu_get_layout(dfu->layout)); 105 return -1; 106 } 107 108 debug("%s: %s 0x%p\n", __func__, cmd_buf, cmd_buf); 109 110 ret = run_command(cmd_buf, 0); 111 if (ret) { 112 puts("dfu: Read error!\n"); 113 return ret; 114 } 115 116 if (dfu->layout != DFU_RAW_ADDR && op == DFU_OP_READ) { 117 str_env = getenv("filesize"); 118 if (str_env == NULL) { 119 puts("dfu: Wrong file size!\n"); 120 return -1; 121 } 122 *len = simple_strtoul(str_env, NULL, 16); 123 } 124 125 return ret; 126 } 127 128 int dfu_write_medium_mmc(struct dfu_entity *dfu, 129 u64 offset, void *buf, long *len) 130 { 131 int ret = -1; 132 133 switch (dfu->layout) { 134 case DFU_RAW_ADDR: 135 ret = mmc_block_op(DFU_OP_WRITE, dfu, offset, buf, len); 136 break; 137 case DFU_FS_FAT: 138 case DFU_FS_EXT4: 139 ret = mmc_file_buffer(dfu, buf, len); 140 break; 141 default: 142 printf("%s: Layout (%s) not (yet) supported!\n", __func__, 143 dfu_get_layout(dfu->layout)); 144 } 145 146 return ret; 147 } 148 149 int dfu_flush_medium_mmc(struct dfu_entity *dfu) 150 { 151 int ret = 0; 152 153 if (dfu->layout != DFU_RAW_ADDR) { 154 /* Do stuff here. */ 155 ret = mmc_file_op(DFU_OP_WRITE, dfu, &dfu_file_buf, 156 &dfu_file_buf_len); 157 158 /* Now that we're done */ 159 dfu_file_buf_len = 0; 160 } 161 162 return ret; 163 } 164 165 int dfu_read_medium_mmc(struct dfu_entity *dfu, u64 offset, void *buf, 166 long *len) 167 { 168 int ret = -1; 169 170 switch (dfu->layout) { 171 case DFU_RAW_ADDR: 172 ret = mmc_block_op(DFU_OP_READ, dfu, offset, buf, len); 173 break; 174 case DFU_FS_FAT: 175 case DFU_FS_EXT4: 176 ret = mmc_file_op(DFU_OP_READ, dfu, buf, len); 177 break; 178 default: 179 printf("%s: Layout (%s) not (yet) supported!\n", __func__, 180 dfu_get_layout(dfu->layout)); 181 } 182 183 return ret; 184 } 185 186 int dfu_fill_entity_mmc(struct dfu_entity *dfu, char *s) 187 { 188 int dev, part; 189 struct mmc *mmc; 190 block_dev_desc_t *blk_dev; 191 disk_partition_t partinfo; 192 char *st; 193 194 dfu->dev_type = DFU_DEV_MMC; 195 st = strsep(&s, " "); 196 if (!strcmp(st, "mmc")) { 197 dfu->layout = DFU_RAW_ADDR; 198 dfu->data.mmc.lba_start = simple_strtoul(s, &s, 16); 199 dfu->data.mmc.lba_size = simple_strtoul(++s, &s, 16); 200 dfu->data.mmc.lba_blk_size = get_mmc_blk_size(dfu->dev_num); 201 } else if (!strcmp(st, "fat")) { 202 dfu->layout = DFU_FS_FAT; 203 } else if (!strcmp(st, "ext4")) { 204 dfu->layout = DFU_FS_EXT4; 205 } else if (!strcmp(st, "part")) { 206 207 dfu->layout = DFU_RAW_ADDR; 208 209 dev = simple_strtoul(s, &s, 10); 210 s++; 211 part = simple_strtoul(s, &s, 10); 212 213 mmc = find_mmc_device(dev); 214 if (mmc == NULL || mmc_init(mmc)) { 215 printf("%s: could not find mmc device #%d!\n", 216 __func__, dev); 217 return -ENODEV; 218 } 219 220 blk_dev = &mmc->block_dev; 221 if (get_partition_info(blk_dev, part, &partinfo) != 0) { 222 printf("%s: could not find partition #%d on mmc device #%d!\n", 223 __func__, part, dev); 224 return -ENODEV; 225 } 226 227 dfu->data.mmc.lba_start = partinfo.start; 228 dfu->data.mmc.lba_size = partinfo.size; 229 dfu->data.mmc.lba_blk_size = partinfo.blksz; 230 231 } else { 232 printf("%s: Memory layout (%s) not supported!\n", __func__, st); 233 return -ENODEV; 234 } 235 236 if (dfu->layout == DFU_FS_EXT4 || dfu->layout == DFU_FS_FAT) { 237 dfu->data.mmc.dev = simple_strtoul(s, &s, 10); 238 dfu->data.mmc.part = simple_strtoul(++s, &s, 10); 239 } 240 241 dfu->read_medium = dfu_read_medium_mmc; 242 dfu->write_medium = dfu_write_medium_mmc; 243 dfu->flush_medium = dfu_flush_medium_mmc; 244 245 /* initial state */ 246 dfu->inited = 0; 247 248 return 0; 249 } 250