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 * SPDX-License-Identifier: GPL-2.0+ 8 */ 9 10 #include <common.h> 11 #include <malloc.h> 12 #include <errno.h> 13 #include <div64.h> 14 #include <dfu.h> 15 16 static unsigned char __aligned(CONFIG_SYS_CACHELINE_SIZE) 17 dfu_file_buf[CONFIG_SYS_DFU_MAX_FILE_SIZE]; 18 static long dfu_file_buf_len; 19 20 static int mmc_block_op(enum dfu_op op, struct dfu_entity *dfu, 21 u64 offset, void *buf, long *len) 22 { 23 char cmd_buf[DFU_CMD_BUF_SIZE]; 24 u32 blk_start, blk_count; 25 26 /* 27 * We must ensure that we work in lba_blk_size chunks, so ALIGN 28 * this value. 29 */ 30 *len = ALIGN(*len, dfu->data.mmc.lba_blk_size); 31 32 blk_start = dfu->data.mmc.lba_start + 33 (u32)lldiv(offset, dfu->data.mmc.lba_blk_size); 34 blk_count = *len / dfu->data.mmc.lba_blk_size; 35 if (blk_start + blk_count > 36 dfu->data.mmc.lba_start + dfu->data.mmc.lba_size) { 37 puts("Request would exceed designated area!\n"); 38 return -EINVAL; 39 } 40 41 sprintf(cmd_buf, "mmc %s %p %x %x", 42 op == DFU_OP_READ ? "read" : "write", 43 buf, blk_start, blk_count); 44 45 debug("%s: %s 0x%p\n", __func__, cmd_buf, cmd_buf); 46 return run_command(cmd_buf, 0); 47 } 48 49 static int mmc_file_buffer(struct dfu_entity *dfu, void *buf, long *len) 50 { 51 if (dfu_file_buf_len + *len > CONFIG_SYS_DFU_MAX_FILE_SIZE) { 52 dfu_file_buf_len = 0; 53 return -EINVAL; 54 } 55 56 /* Add to the current buffer. */ 57 memcpy(dfu_file_buf + dfu_file_buf_len, buf, *len); 58 dfu_file_buf_len += *len; 59 60 return 0; 61 } 62 63 static int mmc_file_op(enum dfu_op op, struct dfu_entity *dfu, 64 void *buf, long *len) 65 { 66 char cmd_buf[DFU_CMD_BUF_SIZE]; 67 char *str_env; 68 int ret; 69 70 switch (dfu->layout) { 71 case DFU_FS_FAT: 72 sprintf(cmd_buf, "fat%s mmc %d:%d 0x%x %s", 73 op == DFU_OP_READ ? "load" : "write", 74 dfu->data.mmc.dev, dfu->data.mmc.part, 75 (unsigned int) buf, dfu->name); 76 break; 77 case DFU_FS_EXT4: 78 sprintf(cmd_buf, "ext4%s mmc %d:%d 0x%x /%s", 79 op == DFU_OP_READ ? "load" : "write", 80 dfu->data.mmc.dev, dfu->data.mmc.part, 81 (unsigned int) buf, dfu->name); 82 break; 83 default: 84 printf("%s: Layout (%s) not (yet) supported!\n", __func__, 85 dfu_get_layout(dfu->layout)); 86 return -1; 87 } 88 89 if (op == DFU_OP_WRITE) 90 sprintf(cmd_buf + strlen(cmd_buf), " %lx", *len); 91 92 debug("%s: %s 0x%p\n", __func__, cmd_buf, cmd_buf); 93 94 ret = run_command(cmd_buf, 0); 95 if (ret) { 96 puts("dfu: Read error!\n"); 97 return ret; 98 } 99 100 if (dfu->layout != DFU_RAW_ADDR && op == DFU_OP_READ) { 101 str_env = getenv("filesize"); 102 if (str_env == NULL) { 103 puts("dfu: Wrong file size!\n"); 104 return -1; 105 } 106 *len = simple_strtoul(str_env, NULL, 16); 107 } 108 109 return ret; 110 } 111 112 int dfu_write_medium_mmc(struct dfu_entity *dfu, 113 u64 offset, void *buf, long *len) 114 { 115 int ret = -1; 116 117 switch (dfu->layout) { 118 case DFU_RAW_ADDR: 119 ret = mmc_block_op(DFU_OP_WRITE, dfu, offset, buf, len); 120 break; 121 case DFU_FS_FAT: 122 case DFU_FS_EXT4: 123 ret = mmc_file_buffer(dfu, buf, len); 124 break; 125 default: 126 printf("%s: Layout (%s) not (yet) supported!\n", __func__, 127 dfu_get_layout(dfu->layout)); 128 } 129 130 return ret; 131 } 132 133 int dfu_flush_medium_mmc(struct dfu_entity *dfu) 134 { 135 int ret = 0; 136 137 if (dfu->layout != DFU_RAW_ADDR) { 138 /* Do stuff here. */ 139 ret = mmc_file_op(DFU_OP_WRITE, dfu, &dfu_file_buf, 140 &dfu_file_buf_len); 141 142 /* Now that we're done */ 143 dfu_file_buf_len = 0; 144 } 145 146 return ret; 147 } 148 149 int dfu_read_medium_mmc(struct dfu_entity *dfu, u64 offset, void *buf, 150 long *len) 151 { 152 int ret = -1; 153 154 switch (dfu->layout) { 155 case DFU_RAW_ADDR: 156 ret = mmc_block_op(DFU_OP_READ, dfu, offset, buf, len); 157 break; 158 case DFU_FS_FAT: 159 case DFU_FS_EXT4: 160 ret = mmc_file_op(DFU_OP_READ, dfu, buf, len); 161 break; 162 default: 163 printf("%s: Layout (%s) not (yet) supported!\n", __func__, 164 dfu_get_layout(dfu->layout)); 165 } 166 167 return ret; 168 } 169 170 int dfu_fill_entity_mmc(struct dfu_entity *dfu, char *s) 171 { 172 int dev, part; 173 struct mmc *mmc; 174 block_dev_desc_t *blk_dev; 175 disk_partition_t partinfo; 176 char *st; 177 178 dfu->dev_type = DFU_DEV_MMC; 179 st = strsep(&s, " "); 180 if (!strcmp(st, "mmc")) { 181 dfu->layout = DFU_RAW_ADDR; 182 dfu->data.mmc.lba_start = simple_strtoul(s, &s, 16); 183 dfu->data.mmc.lba_size = simple_strtoul(++s, &s, 16); 184 dfu->data.mmc.lba_blk_size = get_mmc_blk_size(dfu->dev_num); 185 } else if (!strcmp(st, "fat")) { 186 dfu->layout = DFU_FS_FAT; 187 } else if (!strcmp(st, "ext4")) { 188 dfu->layout = DFU_FS_EXT4; 189 } else if (!strcmp(st, "part")) { 190 191 dfu->layout = DFU_RAW_ADDR; 192 193 dev = simple_strtoul(s, &s, 10); 194 s++; 195 part = simple_strtoul(s, &s, 10); 196 197 mmc = find_mmc_device(dev); 198 if (mmc == NULL || mmc_init(mmc)) { 199 printf("%s: could not find mmc device #%d!\n", 200 __func__, dev); 201 return -ENODEV; 202 } 203 204 blk_dev = &mmc->block_dev; 205 if (get_partition_info(blk_dev, part, &partinfo) != 0) { 206 printf("%s: could not find partition #%d on mmc device #%d!\n", 207 __func__, part, dev); 208 return -ENODEV; 209 } 210 211 dfu->data.mmc.lba_start = partinfo.start; 212 dfu->data.mmc.lba_size = partinfo.size; 213 dfu->data.mmc.lba_blk_size = partinfo.blksz; 214 215 } else { 216 printf("%s: Memory layout (%s) not supported!\n", __func__, st); 217 return -ENODEV; 218 } 219 220 if (dfu->layout == DFU_FS_EXT4 || dfu->layout == DFU_FS_FAT) { 221 dfu->data.mmc.dev = simple_strtoul(s, &s, 10); 222 dfu->data.mmc.part = simple_strtoul(++s, &s, 10); 223 } 224 225 dfu->read_medium = dfu_read_medium_mmc; 226 dfu->write_medium = dfu_write_medium_mmc; 227 dfu->flush_medium = dfu_flush_medium_mmc; 228 229 /* initial state */ 230 dfu->inited = 0; 231 232 return 0; 233 } 234