Loading...
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 | /* * Copyright (c) 2018 Prevas A/S * Copyright (c) 2022 Intel Corporation * * SPDX-License-Identifier: Apache-2.0 */ #include <stdlib.h> #include <errno.h> #include <zephyr/sys/slist.h> #include <zephyr/drivers/smbus.h> #include <zephyr/shell/shell.h> #include <zephyr/logging/log.h> LOG_MODULE_REGISTER(smbus_shell, CONFIG_LOG_DEFAULT_LEVEL); /** * smbus_shell is a highly modified version from i2c_shell. Basically only scan * logic remains from i2c_shell */ /** * Simplify argument parsing, smbus arguments always go in this order: * smbus <shell command> <device> <peripheral address> <command byte> */ #define ARGV_DEV 1 #define ARGV_ADDR 2 #define ARGV_CMD 3 /** * This sends SMBUS messages without any data (i.e. stop condition after * sending just the address). If there is an ACK for the address, it * is assumed there is a device present. * * WARNING: As there is no standard SMBUS detection command, this code * uses arbitrary SMBus commands (namely SMBus quick write to probe for * devices. * This operation can confuse your SMBUS bus, cause data loss, and is * known to corrupt the Atmel AT24RF08 EEPROM found on many IBM * Thinkpad laptops. * * https://manpages.debian.org/buster/i2c-tools/i2cdetect.8.en.html */ /* smbus scan <device> */ static int cmd_smbus_scan(const struct shell *sh, size_t argc, char **argv) { const struct device *dev; uint8_t cnt = 0, first = 0x04, last = 0x77; dev = device_get_binding(argv[ARGV_DEV]); if (!dev) { shell_error(sh, "SMBus: Device %s not found", argv[ARGV_DEV]); return -ENODEV; } shell_print(sh, " 0 1 2 3 4 5 6 7 8 9 a b c d e f"); for (uint8_t i = 0; i <= last; i += 16) { shell_fprintf(sh, SHELL_NORMAL, "%02x: ", i); for (uint8_t j = 0; j < 16; j++) { if (i + j < first || i + j > last) { shell_fprintf(sh, SHELL_NORMAL, " "); continue; } if (smbus_quick(dev, i + j, SMBUS_MSG_WRITE) == 0) { shell_fprintf(sh, SHELL_NORMAL, "%02x ", i + j); ++cnt; } else { shell_fprintf(sh, SHELL_NORMAL, "-- "); } } shell_print(sh, ""); } shell_print(sh, "%u devices found on %s", cnt, argv[ARGV_DEV]); return 0; } /* smbus quick <device> <dev_addr> */ static int cmd_smbus_quick(const struct shell *sh, size_t argc, char **argv) { const struct device *dev; uint8_t addr; int ret; dev = device_get_binding(argv[ARGV_DEV]); if (!dev) { shell_error(sh, "SMBus: Device %s not found", argv[ARGV_DEV]); return -ENODEV; } addr = strtol(argv[ARGV_ADDR], NULL, 16); ret = smbus_quick(dev, addr, SMBUS_MSG_WRITE); if (ret < 0) { shell_error(sh, "SMBus: Failed quick cmd, perip: 0x%02x", addr); } return ret; } /* smbus byte_read <device> <dev_addr> */ static int cmd_smbus_byte_read(const struct shell *sh, size_t argc, char **argv) { const struct device *dev; uint8_t addr; uint8_t out; int ret; dev = device_get_binding(argv[ARGV_DEV]); if (!dev) { shell_error(sh, "SMBus: Device %s not found", argv[ARGV_DEV]); return -ENODEV; } addr = strtol(argv[ARGV_ADDR], NULL, 16); ret = smbus_byte_read(dev, addr, &out); if (ret < 0) { shell_error(sh, "SMBus: Failed to read from periph: 0x%02x", addr); return -EIO; } shell_print(sh, "Output: 0x%x", out); return 0; } /* smbus byte_write <device> <dev_addr> <value> */ static int cmd_smbus_byte_write(const struct shell *sh, size_t argc, char **argv) { const struct device *dev; uint8_t addr; uint8_t value; int ret; dev = device_get_binding(argv[ARGV_DEV]); if (!dev) { shell_error(sh, "SMBus: Device %s not found", argv[ARGV_DEV]); return -ENODEV; } addr = strtol(argv[ARGV_ADDR], NULL, 16); /* First byte is command */ value = strtol(argv[ARGV_CMD], NULL, 16); ret = smbus_byte_write(dev, addr, value); if (ret < 0) { shell_error(sh, "SMBus: Failed to write to periph: 0x%02x", addr); return -EIO; } return 0; } /* smbus byte_data_read <device> <dev_addr> <cmd> */ static int cmd_smbus_byte_data_read(const struct shell *sh, size_t argc, char **argv) { const struct device *dev; uint8_t addr, command; uint8_t out; int ret; dev = device_get_binding(argv[ARGV_DEV]); if (!dev) { shell_error(sh, "SMBus: Device %s not found", argv[ARGV_DEV]); return -ENODEV; } addr = strtol(argv[ARGV_ADDR], NULL, 16); command = strtol(argv[ARGV_CMD], NULL, 16); ret = smbus_byte_data_read(dev, addr, command, &out); if (ret < 0) { shell_error(sh, "SMBus: Failed to read from periph: 0x%02x", addr); return -EIO; } shell_print(sh, "Output: 0x%x", out); return 0; } /* smbus byte_data_write <device> <dev_addr> <cmd> <value> */ static int cmd_smbus_byte_data_write(const struct shell *sh, size_t argc, char **argv) { const struct device *dev; uint8_t addr, command; uint8_t value; int ret; dev = device_get_binding(argv[ARGV_DEV]); if (!dev) { shell_error(sh, "SMBus: Device %s not found", argv[ARGV_DEV]); return -ENODEV; } addr = strtol(argv[ARGV_ADDR], NULL, 16); command = strtol(argv[ARGV_CMD], NULL, 16); value = strtol(argv[4], NULL, 16); ret = smbus_byte_data_write(dev, addr, command, value); if (ret < 0) { shell_error(sh, "SMBus: Failed to write to periph: 0x%02x", addr); return -EIO; } return 0; } /* smbus word_data_read <device> <dev_addr> <cmd> */ static int cmd_smbus_word_data_read(const struct shell *sh, size_t argc, char **argv) { const struct device *dev; uint8_t addr, command; uint16_t out; int ret; dev = device_get_binding(argv[ARGV_DEV]); if (!dev) { shell_error(sh, "SMBus: Device %s not found", argv[ARGV_DEV]); return -ENODEV; } addr = strtol(argv[ARGV_ADDR], NULL, 16); command = strtol(argv[ARGV_CMD], NULL, 16); ret = smbus_word_data_read(dev, addr, command, &out); if (ret < 0) { shell_error(sh, "SMBus: Failed to read from periph: 0x%02x", addr); return -EIO; } shell_print(sh, "Output: 0x%04x", out); return 0; } /* smbus word_data_write <device> <dev_addr> <cmd> <value> */ static int cmd_smbus_word_data_write(const struct shell *sh, size_t argc, char **argv) { const struct device *dev; uint8_t addr, command; uint16_t value; int ret; dev = device_get_binding(argv[ARGV_DEV]); if (!dev) { shell_error(sh, "SMBus: Device %s not found", argv[ARGV_DEV]); return -ENODEV; } addr = strtol(argv[ARGV_ADDR], NULL, 16); command = strtol(argv[ARGV_CMD], NULL, 16); value = strtol(argv[4], NULL, 16); ret = smbus_word_data_write(dev, addr, command, value); if (ret < 0) { shell_error(sh, "SMBus: Failed to write to periph: 0x%02x", addr); return -EIO; } return 0; } /* smbus block_write <device> <dev_addr> <cmd> <bytes ... > */ static int cmd_smbus_block_write(const struct shell *sh, size_t argc, char **argv) { const struct device *dev; uint8_t addr, command; uint8_t count = argc - 4; char **p = &argv[4]; /* start data bytes */ uint8_t buf[32]; /* max block count */ int ret; if (count == 0 || count > sizeof(buf)) { return -EINVAL; } dev = device_get_binding(argv[ARGV_DEV]); if (!dev) { shell_error(sh, "SMBus: Device %s not found", argv[ARGV_DEV]); return -ENODEV; } addr = strtol(argv[ARGV_ADDR], NULL, 16); command = strtol(argv[ARGV_CMD], NULL, 16); for (int i = 0; i < count; i++) { buf[i] = (uint8_t)strtoul(p[i], NULL, 16); } LOG_HEXDUMP_DBG(buf, count, "Constructed block buffer"); ret = smbus_block_write(dev, addr, command, count, buf); if (ret < 0) { shell_error(sh, "Failed block write to periph: 0x%02x", addr); return ret; } return 0; } /* smbus block_read <device> <dev_addr> <cmd> */ static int cmd_smbus_block_read(const struct shell *sh, size_t argc, char **argv) { const struct device *dev; uint8_t addr, command; uint8_t buf[32]; /* max block count */ uint8_t count; int ret; dev = device_get_binding(argv[ARGV_DEV]); if (!dev) { shell_error(sh, "SMBus: Device %s not found", argv[ARGV_DEV]); return -ENODEV; } addr = strtol(argv[ARGV_ADDR], NULL, 16); command = strtol(argv[ARGV_CMD], NULL, 16); ret = smbus_block_read(dev, addr, command, &count, buf); if (ret < 0) { shell_error(sh, "Failed block read from periph: 0x%02x", addr); return ret; } if (count == 0 || count > sizeof(buf)) { shell_error(sh, "Returned count %u", count); return -ENODATA; } shell_hexdump(sh, buf, count); return 0; } /* Device name autocompletion support */ static void device_name_get(size_t idx, struct shell_static_entry *entry) { const struct device *dev = shell_device_lookup(idx, "smbus"); entry->syntax = (dev != NULL) ? dev->name : NULL; entry->handler = NULL; entry->help = NULL; entry->subcmd = NULL; } SHELL_DYNAMIC_CMD_CREATE(dsub_device_name, device_name_get); SHELL_STATIC_SUBCMD_SET_CREATE(sub_smbus_cmds, SHELL_CMD_ARG(quick, &dsub_device_name, "SMBus Quick command\n" "Usage: quick <device> <addr>", cmd_smbus_quick, 3, 0), SHELL_CMD_ARG(scan, &dsub_device_name, "Scan SMBus peripheral devices command\n" "Usage: scan <device>", cmd_smbus_scan, 2, 0), SHELL_CMD_ARG(byte_read, &dsub_device_name, "SMBus: byte read command\n" "Usage: byte_read <device> <addr>", cmd_smbus_byte_read, 3, 0), SHELL_CMD_ARG(byte_write, &dsub_device_name, "SMBus: byte write command\n" "Usage: byte_write <device> <addr> <value>", cmd_smbus_byte_write, 4, 0), SHELL_CMD_ARG(byte_data_read, &dsub_device_name, "SMBus: byte data read command\n" "Usage: byte_data_read <device> <addr> <cmd>", cmd_smbus_byte_data_read, 4, 0), SHELL_CMD_ARG(byte_data_write, &dsub_device_name, "SMBus: byte data write command\n" "Usage: byte_data_write <device> <addr> <cmd> <value>", cmd_smbus_byte_data_write, 5, 0), SHELL_CMD_ARG(word_data_read, &dsub_device_name, "SMBus: word data read command\n" "Usage: word_data_read <device> <addr> <cmd>", cmd_smbus_word_data_read, 4, 0), SHELL_CMD_ARG(word_data_write, &dsub_device_name, "SMBus: word data write command\n" "Usage: word_data_write <device> <addr> <cmd> <value>", cmd_smbus_word_data_write, 5, 0), SHELL_CMD_ARG(block_write, &dsub_device_name, "SMBus: Block Write command\n" "Usage: block_write <device> <addr> <cmd> [<byte1>, ...]", cmd_smbus_block_write, 4, 32), SHELL_CMD_ARG(block_read, &dsub_device_name, "SMBus: Block Read command\n" "Usage: block_read <device> <addr> <cmd>", cmd_smbus_block_read, 4, 0), SHELL_SUBCMD_SET_END /* Array terminated. */ ); SHELL_CMD_REGISTER(smbus, &sub_smbus_cmds, "smbus commands", NULL); |