Alex Kiernan | d5aa57c | 2018-05-29 15:30:53 +0000 | [diff] [blame] | 1 | // SPDX-License-Identifier: BSD-2-Clause |
| 2 | /* |
| 3 | * Copyright (C) 2016 The Android Open Source Project |
| 4 | */ |
| 5 | |
| 6 | #include <common.h> |
Simon Glass | 313112a | 2019-08-01 09:46:46 -0600 | [diff] [blame] | 7 | #include <env.h> |
Alex Kiernan | d5aa57c | 2018-05-29 15:30:53 +0000 | [diff] [blame] | 8 | #include <fastboot.h> |
| 9 | #include <fastboot-internal.h> |
| 10 | #include <fb_mmc.h> |
| 11 | #include <fb_nand.h> |
| 12 | #include <part.h> |
| 13 | #include <stdlib.h> |
| 14 | |
| 15 | /** |
| 16 | * image_size - final fastboot image size |
| 17 | */ |
| 18 | static u32 image_size; |
| 19 | |
| 20 | /** |
| 21 | * fastboot_bytes_received - number of bytes received in the current download |
| 22 | */ |
| 23 | static u32 fastboot_bytes_received; |
| 24 | |
| 25 | /** |
| 26 | * fastboot_bytes_expected - number of bytes expected in the current download |
| 27 | */ |
| 28 | static u32 fastboot_bytes_expected; |
| 29 | |
| 30 | static void okay(char *, char *); |
| 31 | static void getvar(char *, char *); |
| 32 | static void download(char *, char *); |
| 33 | #if CONFIG_IS_ENABLED(FASTBOOT_FLASH) |
| 34 | static void flash(char *, char *); |
| 35 | static void erase(char *, char *); |
| 36 | #endif |
| 37 | static void reboot_bootloader(char *, char *); |
Alex Kiernan | c86cde9 | 2018-05-29 15:30:54 +0000 | [diff] [blame] | 38 | #if CONFIG_IS_ENABLED(FASTBOOT_CMD_OEM_FORMAT) |
| 39 | static void oem_format(char *, char *); |
| 40 | #endif |
Alex Kiernan | d5aa57c | 2018-05-29 15:30:53 +0000 | [diff] [blame] | 41 | |
| 42 | static const struct { |
| 43 | const char *command; |
| 44 | void (*dispatch)(char *cmd_parameter, char *response); |
| 45 | } commands[FASTBOOT_COMMAND_COUNT] = { |
| 46 | [FASTBOOT_COMMAND_GETVAR] = { |
| 47 | .command = "getvar", |
| 48 | .dispatch = getvar |
| 49 | }, |
| 50 | [FASTBOOT_COMMAND_DOWNLOAD] = { |
| 51 | .command = "download", |
| 52 | .dispatch = download |
| 53 | }, |
| 54 | #if CONFIG_IS_ENABLED(FASTBOOT_FLASH) |
| 55 | [FASTBOOT_COMMAND_FLASH] = { |
| 56 | .command = "flash", |
| 57 | .dispatch = flash |
| 58 | }, |
| 59 | [FASTBOOT_COMMAND_ERASE] = { |
| 60 | .command = "erase", |
| 61 | .dispatch = erase |
| 62 | }, |
| 63 | #endif |
| 64 | [FASTBOOT_COMMAND_BOOT] = { |
| 65 | .command = "boot", |
| 66 | .dispatch = okay |
| 67 | }, |
| 68 | [FASTBOOT_COMMAND_CONTINUE] = { |
| 69 | .command = "continue", |
| 70 | .dispatch = okay |
| 71 | }, |
| 72 | [FASTBOOT_COMMAND_REBOOT] = { |
| 73 | .command = "reboot", |
| 74 | .dispatch = okay |
| 75 | }, |
| 76 | [FASTBOOT_COMMAND_REBOOT_BOOTLOADER] = { |
| 77 | .command = "reboot-bootloader", |
| 78 | .dispatch = reboot_bootloader |
| 79 | }, |
| 80 | [FASTBOOT_COMMAND_SET_ACTIVE] = { |
| 81 | .command = "set_active", |
| 82 | .dispatch = okay |
| 83 | }, |
Alex Kiernan | c86cde9 | 2018-05-29 15:30:54 +0000 | [diff] [blame] | 84 | #if CONFIG_IS_ENABLED(FASTBOOT_CMD_OEM_FORMAT) |
| 85 | [FASTBOOT_COMMAND_OEM_FORMAT] = { |
| 86 | .command = "oem format", |
| 87 | .dispatch = oem_format, |
| 88 | }, |
| 89 | #endif |
Alex Kiernan | d5aa57c | 2018-05-29 15:30:53 +0000 | [diff] [blame] | 90 | }; |
| 91 | |
| 92 | /** |
| 93 | * fastboot_handle_command - Handle fastboot command |
| 94 | * |
| 95 | * @cmd_string: Pointer to command string |
| 96 | * @response: Pointer to fastboot response buffer |
| 97 | * |
| 98 | * Return: Executed command, or -1 if not recognized |
| 99 | */ |
| 100 | int fastboot_handle_command(char *cmd_string, char *response) |
| 101 | { |
| 102 | int i; |
| 103 | char *cmd_parameter; |
| 104 | |
| 105 | cmd_parameter = cmd_string; |
| 106 | strsep(&cmd_parameter, ":"); |
| 107 | |
| 108 | for (i = 0; i < FASTBOOT_COMMAND_COUNT; i++) { |
| 109 | if (!strcmp(commands[i].command, cmd_string)) { |
| 110 | if (commands[i].dispatch) { |
| 111 | commands[i].dispatch(cmd_parameter, |
| 112 | response); |
| 113 | return i; |
| 114 | } else { |
| 115 | break; |
| 116 | } |
| 117 | } |
| 118 | } |
| 119 | |
| 120 | pr_err("command %s not recognized.\n", cmd_string); |
| 121 | fastboot_fail("unrecognized command", response); |
| 122 | return -1; |
| 123 | } |
| 124 | |
| 125 | /** |
| 126 | * okay() - Send bare OKAY response |
| 127 | * |
| 128 | * @cmd_parameter: Pointer to command parameter |
| 129 | * @response: Pointer to fastboot response buffer |
| 130 | * |
| 131 | * Send a bare OKAY fastboot response. This is used where the command is |
| 132 | * valid, but all the work is done after the response has been sent (e.g. |
| 133 | * boot, reboot etc.) |
| 134 | */ |
| 135 | static void okay(char *cmd_parameter, char *response) |
| 136 | { |
| 137 | fastboot_okay(NULL, response); |
| 138 | } |
| 139 | |
| 140 | /** |
| 141 | * getvar() - Read a config/version variable |
| 142 | * |
| 143 | * @cmd_parameter: Pointer to command parameter |
| 144 | * @response: Pointer to fastboot response buffer |
| 145 | */ |
| 146 | static void getvar(char *cmd_parameter, char *response) |
| 147 | { |
| 148 | fastboot_getvar(cmd_parameter, response); |
| 149 | } |
| 150 | |
| 151 | /** |
| 152 | * fastboot_download() - Start a download transfer from the client |
| 153 | * |
| 154 | * @cmd_parameter: Pointer to command parameter |
| 155 | * @response: Pointer to fastboot response buffer |
| 156 | */ |
| 157 | static void download(char *cmd_parameter, char *response) |
| 158 | { |
| 159 | char *tmp; |
| 160 | |
| 161 | if (!cmd_parameter) { |
| 162 | fastboot_fail("Expected command parameter", response); |
| 163 | return; |
| 164 | } |
| 165 | fastboot_bytes_received = 0; |
| 166 | fastboot_bytes_expected = simple_strtoul(cmd_parameter, &tmp, 16); |
| 167 | if (fastboot_bytes_expected == 0) { |
| 168 | fastboot_fail("Expected nonzero image size", response); |
| 169 | return; |
| 170 | } |
| 171 | /* |
| 172 | * Nothing to download yet. Response is of the form: |
| 173 | * [DATA|FAIL]$cmd_parameter |
| 174 | * |
| 175 | * where cmd_parameter is an 8 digit hexadecimal number |
| 176 | */ |
| 177 | if (fastboot_bytes_expected > fastboot_buf_size) { |
| 178 | fastboot_fail(cmd_parameter, response); |
| 179 | } else { |
| 180 | printf("Starting download of %d bytes\n", |
| 181 | fastboot_bytes_expected); |
| 182 | fastboot_response("DATA", response, "%s", cmd_parameter); |
| 183 | } |
| 184 | } |
| 185 | |
| 186 | /** |
| 187 | * fastboot_data_remaining() - return bytes remaining in current transfer |
| 188 | * |
| 189 | * Return: Number of bytes left in the current download |
| 190 | */ |
| 191 | u32 fastboot_data_remaining(void) |
| 192 | { |
| 193 | return fastboot_bytes_expected - fastboot_bytes_received; |
| 194 | } |
| 195 | |
| 196 | /** |
| 197 | * fastboot_data_download() - Copy image data to fastboot_buf_addr. |
| 198 | * |
| 199 | * @fastboot_data: Pointer to received fastboot data |
| 200 | * @fastboot_data_len: Length of received fastboot data |
| 201 | * @response: Pointer to fastboot response buffer |
| 202 | * |
| 203 | * Copies image data from fastboot_data to fastboot_buf_addr. Writes to |
| 204 | * response. fastboot_bytes_received is updated to indicate the number |
| 205 | * of bytes that have been transferred. |
| 206 | * |
| 207 | * On completion sets image_size and ${filesize} to the total size of the |
| 208 | * downloaded image. |
| 209 | */ |
| 210 | void fastboot_data_download(const void *fastboot_data, |
| 211 | unsigned int fastboot_data_len, |
| 212 | char *response) |
| 213 | { |
| 214 | #define BYTES_PER_DOT 0x20000 |
| 215 | u32 pre_dot_num, now_dot_num; |
| 216 | |
| 217 | if (fastboot_data_len == 0 || |
| 218 | (fastboot_bytes_received + fastboot_data_len) > |
| 219 | fastboot_bytes_expected) { |
| 220 | fastboot_fail("Received invalid data length", |
| 221 | response); |
| 222 | return; |
| 223 | } |
| 224 | /* Download data to fastboot_buf_addr */ |
| 225 | memcpy(fastboot_buf_addr + fastboot_bytes_received, |
| 226 | fastboot_data, fastboot_data_len); |
| 227 | |
| 228 | pre_dot_num = fastboot_bytes_received / BYTES_PER_DOT; |
| 229 | fastboot_bytes_received += fastboot_data_len; |
| 230 | now_dot_num = fastboot_bytes_received / BYTES_PER_DOT; |
| 231 | |
| 232 | if (pre_dot_num != now_dot_num) { |
| 233 | putc('.'); |
| 234 | if (!(now_dot_num % 74)) |
| 235 | putc('\n'); |
| 236 | } |
| 237 | *response = '\0'; |
| 238 | } |
| 239 | |
| 240 | /** |
| 241 | * fastboot_data_complete() - Mark current transfer complete |
| 242 | * |
| 243 | * @response: Pointer to fastboot response buffer |
| 244 | * |
| 245 | * Set image_size and ${filesize} to the total size of the downloaded image. |
| 246 | */ |
| 247 | void fastboot_data_complete(char *response) |
| 248 | { |
| 249 | /* Download complete. Respond with "OKAY" */ |
| 250 | fastboot_okay(NULL, response); |
| 251 | printf("\ndownloading of %d bytes finished\n", fastboot_bytes_received); |
| 252 | image_size = fastboot_bytes_received; |
| 253 | env_set_hex("filesize", image_size); |
| 254 | fastboot_bytes_expected = 0; |
| 255 | fastboot_bytes_received = 0; |
| 256 | } |
| 257 | |
| 258 | #if CONFIG_IS_ENABLED(FASTBOOT_FLASH) |
| 259 | /** |
| 260 | * flash() - write the downloaded image to the indicated partition. |
| 261 | * |
| 262 | * @cmd_parameter: Pointer to partition name |
| 263 | * @response: Pointer to fastboot response buffer |
| 264 | * |
| 265 | * Writes the previously downloaded image to the partition indicated by |
| 266 | * cmd_parameter. Writes to response. |
| 267 | */ |
| 268 | static void flash(char *cmd_parameter, char *response) |
| 269 | { |
| 270 | #if CONFIG_IS_ENABLED(FASTBOOT_FLASH_MMC) |
| 271 | fastboot_mmc_flash_write(cmd_parameter, fastboot_buf_addr, image_size, |
| 272 | response); |
| 273 | #endif |
| 274 | #if CONFIG_IS_ENABLED(FASTBOOT_FLASH_NAND) |
| 275 | fastboot_nand_flash_write(cmd_parameter, fastboot_buf_addr, image_size, |
| 276 | response); |
| 277 | #endif |
| 278 | } |
| 279 | |
| 280 | /** |
| 281 | * erase() - erase the indicated partition. |
| 282 | * |
| 283 | * @cmd_parameter: Pointer to partition name |
| 284 | * @response: Pointer to fastboot response buffer |
| 285 | * |
| 286 | * Erases the partition indicated by cmd_parameter (clear to 0x00s). Writes |
| 287 | * to response. |
| 288 | */ |
| 289 | static void erase(char *cmd_parameter, char *response) |
| 290 | { |
| 291 | #if CONFIG_IS_ENABLED(FASTBOOT_FLASH_MMC) |
| 292 | fastboot_mmc_erase(cmd_parameter, response); |
| 293 | #endif |
| 294 | #if CONFIG_IS_ENABLED(FASTBOOT_FLASH_NAND) |
| 295 | fastboot_nand_erase(cmd_parameter, response); |
| 296 | #endif |
| 297 | } |
| 298 | #endif |
| 299 | |
| 300 | /** |
| 301 | * reboot_bootloader() - Sets reboot bootloader flag. |
| 302 | * |
| 303 | * @cmd_parameter: Pointer to command parameter |
| 304 | * @response: Pointer to fastboot response buffer |
| 305 | */ |
| 306 | static void reboot_bootloader(char *cmd_parameter, char *response) |
| 307 | { |
| 308 | if (fastboot_set_reboot_flag()) |
| 309 | fastboot_fail("Cannot set reboot flag", response); |
| 310 | else |
| 311 | fastboot_okay(NULL, response); |
| 312 | } |
Alex Kiernan | c86cde9 | 2018-05-29 15:30:54 +0000 | [diff] [blame] | 313 | |
| 314 | #if CONFIG_IS_ENABLED(FASTBOOT_CMD_OEM_FORMAT) |
| 315 | /** |
| 316 | * oem_format() - Execute the OEM format command |
| 317 | * |
| 318 | * @cmd_parameter: Pointer to command parameter |
| 319 | * @response: Pointer to fastboot response buffer |
| 320 | */ |
| 321 | static void oem_format(char *cmd_parameter, char *response) |
| 322 | { |
| 323 | char cmdbuf[32]; |
| 324 | |
| 325 | if (!env_get("partitions")) { |
| 326 | fastboot_fail("partitions not set", response); |
| 327 | } else { |
| 328 | sprintf(cmdbuf, "gpt write mmc %x $partitions", |
| 329 | CONFIG_FASTBOOT_FLASH_MMC_DEV); |
| 330 | if (run_command(cmdbuf, 0)) |
| 331 | fastboot_fail("", response); |
| 332 | else |
| 333 | fastboot_okay(NULL, response); |
| 334 | } |
| 335 | } |
| 336 | #endif |